Caesars Sportsbook Review

Content on this page may include affiliate links. If you click and sign up/place a wager, we may receive compensation at no cost to you.

Caesars Sportsbook welcome bonus details

  • Welcome bonus
    Bet $1, Double Your Winnings Your Next 10 Bets
  • Promo code
    CBSDYW
  • Minimum deposit
    $10
  • Bonus bet expiration
    14 days
Bet $1, Double Your Winnings Your Next 10 Bets
Up To $25 Max Bet Per Boost
Promo Code
CBSDYW
Copied!
Claim bonus Must be 21+ and physically present in AZ, CO, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, NJ, NY, NC, OH, PA, TN, VA, WV, WY or Washington, DC. New users only. Must register using eligible promo code. Min. qualifying bet amount: $1. Tokens max. bet amount: $25 per token. Tokens bet max. add’l winnings: $2,500 per token. Token(s) expire 14 days after receipt. Not reissued for voided/pushed bets. Void where prohibited. See Caesars.com/promos for full terms. Know When To Stop Before You Start®. Gambling Problem? CO, IL, KY, MD, MI, NJ, OH, TN, VA, WV, WY, Washington, D.C. (OLG Class A licensed Operator), KS (Affiliated with Kansas Crossing Casino), LA (Licensed through Horseshoe Bossier City and Caesars New Orleans), ME (Licensed through the Mi’kmaq Nation, Penobscot Nation, and Houlton Band of Maliseet Indians, federally recognized tribes located in the State of Maine), NC (Licensed through Tribal Casino Gaming Enterprise), PA (Affiliated with Harrah’s Philadelphia): If you or someone you know has a gambling problem, crisis counseling and referral services can be accessed by calling 1-800-GAMBLER (1-800-426-2537) or MD: visit mdgamblinghelp.org or WV: visit 1800gambler.net; AZ: Call 1-800-NEXT-STEP; IN: Call 1-800-9-WITH-IT; IA: Call 1-800-BETSOFF. Data & text rates may apply. Gambling Problem? Call 1-800-GAMBLER, MA: Call 1-800-327-5050 or visit gamblinghelplinema.org, NY: Call 877-8-HOPENY or text HOPENY (467369).
mastercardpaynearmepaypalplaypluscardvisa

Caesars Sportsbook ratings

4.9/5
  • Bonuses & promos 5
  • User experience 4.9
  • Key features 4.9
  • Banking options 4.8
  • Betting markets & odds 4.8
  • Customer support 5

Pros

  • Elite loyalty program in Caesars Rewards
  • Many deposit and withdrawal methods
  • Incredible mobile app
  • Frequent sweepstakes and giveaways

Cons

  • Somewhat limited betting markets
Caesars at a glance
Available states:
Arizona, Colorado, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Mississippi, Nevada, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia, Washington D.C., Wyoming
  • Est.
    2018
  • Headquarters
    Las Vegas, NV
  • CEO
    Thomas Reeg

Caesars Sportsbook overview

You may know Caesars from one of its many iconic hotels, including those on the Las Vegas Strip. The company has grown well beyond its land-based reputation to become a leader in the online space. 

Now, Caesars Sportsbook is accessible in more than 20 markets across the country. It keeps players engaged with competitive odds, special promos and one of the top rewards program in the industry. 

Plus, the Caesars Sportsbook promo is Bet $1, Double Your Winnings Your Next 10 Bets. We spent a great deal of time using Caesars Sportsbook in order to cover everything that matters to new and seasoned gamblers alike. Read on for our comprehensive Caesars review. 

Bonuses & promotions

5/5

Sign up for Caesars Sportsbook using this exclusive link and bonus code ‘CBSDYW’ to get the Caesars welcome bonus.

Bet $1, Double Your Winnings Your Next 10 Bets
Up To $25 Max Bet Per Boost

Validated on: December 12, 2024

Claim bonus

Must be 21+ and physically present in AZ, CO, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, NJ, NY, NC, OH, PA, TN, VA, WV, WY or Washington, DC. New users only. Must register using eligible promo code. Min. qualifying bet amount: $1. Tokens max. bet amount: $25 per token. Tokens bet max. add’l winnings: $2,500 per token. Token(s) expire 14 days after receipt. Not reissued for voided/pushed bets. Void where prohibited. See Caesars.com/promos for full terms. Know When To Stop Before You Start®. Gambling Problem? CO, IL, KY, MD, MI, NJ, OH, TN, VA, WV, WY, Washington, D.C. (OLG Class A licensed Operator), KS (Affiliated with Kansas Crossing Casino), LA (Licensed through Horseshoe Bossier City and Caesars New Orleans), ME (Licensed through the Mi’kmaq Nation, Penobscot Nation, and Houlton Band of Maliseet Indians, federally recognized tribes located in the State of Maine), NC (Licensed through Tribal Casino Gaming Enterprise), PA (Affiliated with Harrah’s Philadelphia): If you or someone you know has a gambling problem, crisis counseling and referral services can be accessed by calling 1-800-GAMBLER (1-800-426-2537) or MD: visit mdgamblinghelp.org or WV: visit 1800gambler.net; AZ: Call 1-800-NEXT-STEP; IN: Call 1-800-9-WITH-IT; IA: Call 1-800-BETSOFF. Data & text rates may apply. Gambling Problem? Call 1-800-GAMBLER, MA: Call 1-800-327-5050 or visit gamblinghelplinema.org, NY: Call 877-8-HOPENY or text HOPENY (467369).

Validated on: December 12, 2024

When you join with the promo code ‘CBSDYW‘ and bet $1, you’ll receive (10) 100% Profit Boost Tokens to use on any market. The max wager for each rewarded Profit Boost is $25. For example, say you place a $10 wager on your home team to win their next game at +250 odds. If they win, you will receive $50 in profit, which you can use on futures wagers. The max additional winnings for each rewarded Profit Boost is $2,500.

This bonus is particularly good because it offers one of the highest dollar amounts of any sports betting bonus in the U.S. 

The profit boosts will expire after 14 days.

Other promos & bonuses at Caesars Sportsbook

Caesars is a prime destination for sportsbook promotions. There are dozens available at any given time. Here are a few of the best types of Caesars promo offers you can claim: 

Caesars giveaways and sweepstakes

One of the perks of placing your bets at Caesars Sportsbook is the occasional chance at winning a massive prize, like a luxury getaway. The terms and conditions vary, as do the prizes offered. Recently, Caesars Sportsbook offered an NHL Flyaway experience to three lucky bettors who won a giveaway. To qualify, bettors had to opt in and place $50 or more on bets with minimum odds of -200. 

The prizes offered are regularly switched, so check back often to see if there’s a luxury experience giveaway that you’re interested in. 

Credit giveaways

For special events such as the NFL postseason, Caesars Sportsbook runs giveaways that grant users reward credits for the Caesars Rewards program. Look for massive prizes in these promos and read the conditions, as they can change depending on the event. 

Profit boosts

Profit boosts are common in most sportsbooks, but Caesars has one of the best selections of any platform. Standard, sport-specific boosts are offered frequently, such as a 33% boost on an NBA game. Selecting “Boosts” from the homepage of Caesars Sportsbook will bring you to (usually) dozens of specific boosts on upcoming matches. Pursue them to see if your preferred bet has a boost.  

Refer a friend

The Caesars Sportsbook referral bonus grants you and the friend you refer 5,000 Reward Credits each. It’s a unique referral bonus in that it doesn’t directly give you bonus bets like other sportsbooks. The Caesars Rewards program is excellent, though, so you might want to consider claiming the bonus if you plan to redeem perks.

User experience

4.9/5

For a company that offers some of the nation’s best hotels and casinos, one might expect Caesars Sportsbook to offer an outstanding user experience. Fortunately, Caesars delivers on these expectations, and even exceeds them. Here’s why:

The Caesars user experience on desktop and mobile is polished. From the second you download the app, you are in good hands. The buttons and menu items are clear and intuitive. It only takes a few seconds to place a bet. 

The Caesars app has one of the best designs of any sportsbook. The color scheme is a dark green laid over white with a muted gold accent color. The result is a product that is simultaneously easy to look at and simple to understand. The user interface does a great job of guiding users through every action by highlighting popular options and displaying everything you need. For example, the “Place Bet” action requires you to swipe up, which is a satisfying way to lock in a wager. 

Bet $1, Double Your Winnings Your Next 10 Bets
Up To $25 Max Bet Per Boost

Validated on: December 12, 2024

Claim bonus

Must be 21+ and physically present in AZ, CO, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, NJ, NY, NC, OH, PA, TN, VA, WV, WY or Washington, DC. New users only. Must register using eligible promo code. Min. qualifying bet amount: $1. Tokens max. bet amount: $25 per token. Tokens bet max. add’l winnings: $2,500 per token. Token(s) expire 14 days after receipt. Not reissued for voided/pushed bets. Void where prohibited. See Caesars.com/promos for full terms. Know When To Stop Before You Start®. Gambling Problem? CO, IL, KY, MD, MI, NJ, OH, TN, VA, WV, WY, Washington, D.C. (OLG Class A licensed Operator), KS (Affiliated with Kansas Crossing Casino), LA (Licensed through Horseshoe Bossier City and Caesars New Orleans), ME (Licensed through the Mi’kmaq Nation, Penobscot Nation, and Houlton Band of Maliseet Indians, federally recognized tribes located in the State of Maine), NC (Licensed through Tribal Casino Gaming Enterprise), PA (Affiliated with Harrah’s Philadelphia): If you or someone you know has a gambling problem, crisis counseling and referral services can be accessed by calling 1-800-GAMBLER (1-800-426-2537) or MD: visit mdgamblinghelp.org or WV: visit 1800gambler.net; AZ: Call 1-800-NEXT-STEP; IN: Call 1-800-9-WITH-IT; IA: Call 1-800-BETSOFF. Data & text rates may apply. Gambling Problem? Call 1-800-GAMBLER, MA: Call 1-800-327-5050 or visit gamblinghelplinema.org, NY: Call 877-8-HOPENY or text HOPENY (467369).

Validated on: December 12, 2024

How to sign up for Caesars Sportsbook

Caesars Sportsbook makes signing up a breeze. To get started, follow these steps:

  1. Click on our exclusive Caesars Sportsbook links. 
  2. Select your state from the drop-down menu and click “Continue.”
  3. On the next page, click “Get Started.”
  4. The sign-up page starts by asking for your email address and a promo code. Provide your email address and use our exclusive link and promo code ‘CBSDYW‘ to get the bonus. 
  5. Provide a password and your phone number. 
  6. Continue providing the requested info, including your address, name and identification (usually a government-issued photo ID and the last four digits of your social security number).
  7. Complete the signup and make a deposit. 

Once you’ve done all that, you’re set to start betting. Be sure to keep the first bet bonus in mind when you place your initial wager. 

Caesars Sportsbook app: Sleek, fast, intuitive

The Caesars Sportsbook app is everything you look for in a mobile sportsbook: speedy, responsive and easy on the eyes. The core user interface is incredibly sleek, with only three primary menu options on the bottom: Home, My Promos and Bets.

The account button at the top of the app home screen (represented by either your initials or a profile photo) seamlessly brings up a menu that allows you to withdraw, deposit, check your rewards balance, refer friends or access your preferences.

As for the betting itself? It’s very smooth at Caesars Sportsbook. The app is highly responsive and updates quickly to reflect odds changes for live betting.

We didn’t find any hitches in the Caesars Sportsbook app.

Key features

4.9/5

Caesars offers a simple sports betting experience, in a good way. While it doesn’t have some of the same bells and whistles as its competitors, there are still plenty of features worth noting. 

Scoreboard and game tracker

When a game or match is live, Caesars offers clean and simplified views of the score and progress via scoreboard and game tracker widgets. Click on them for a live match, and you’ll get an at-a-glance view of all the key information.

While live streams in place of these tools would be nice, they’re still good resources. 

Live betting

Caesars is an excellent sportsbook for live betting. It quickly updates odds for in-progress matchups, and offers a dedicated “Live” page where you can sift through the sports that have active games. Caesars Sportsbook comes highly recommended for fans of live betting. 

Dozens of boosts

Caesars Sportsbook’s boosts have been mentioned a few times, but they’re worth bringing up once more. Click the “Boosts” icon in the top menu to see all sorts of amazing profit boosts and special offers for specific bets. These are a great way to maximize your potential winnings, especially if your desired bet is listed. 

Banking options

4.8/5

Caesars has a wealth of banking options for sports bettors. Deposits will almost always hit your account instantly, while withdrawals can take longer to process. Here’s a quick look at the main payment methods offered by Caesars Sportsbook. They may vary for you depending on state regulations. 

PayPal
Deposityes
Withdrawalyes
Withdrawal speedWithin 1 hour
Additional feesno
Online banking
Deposityes
Withdrawalyes
Withdrawal speedUp to 5 business days
Additional feesno
Credit/debit
Deposityes
Withdrawalyes (debit only)
Withdrawal speed30 minutes
Additional feesno
Apple Pay
Deposityes
Withdrawalno
Withdrawal speedN/A
Additional feesno
Venmo
Deposityes
Withdrawalno
Withdrawal speedN/A
Additional feesno
ACH ECheck
Deposityes
Withdrawalyes
Withdrawal speedUp to 5 business days
Additional feesno
PayNearMe
Deposityes
Withdrawalno
Withdrawal speedN/A
Additional feesno
Play+ Card
Deposityes
Withdrawalyes
Withdrawal speedSame day
Additional feesno

Caesars offers some of the fastest withdrawals of any sportsbook, with some methods that take less than an hour. 

You may also be able to deposit or withdraw at a Caesars property (or approved partner) in your state if there’s a participating location. 

Bannking terms and conditions

Once you’re ready to make a deposit or withdrawal from Caesars, you should keep a few terms and conditions in mind. 

PayPal has limits

PayPal is one of the fastest, most secure and most trusted payment platforms out there. It is highly recommended for sports bettors at Caesars or elsewhere. However, keep in mind that any money you deposit with PayPal can only be withdrawn via PayPal. 

Minimums and maximums at Caesars

The minimum deposit for most methods at Caesars Sportsbook is $10. Some sportsbooks have better minimums, but this one isn’t all that bad. Meanwhile, Caesars has a daily maximum transaction limit of $500. 

Transaction fees

Caesars Sportsbook doesn’t charge any fees for deposits or withdrawals. However, your provider or banking institution might. It is worthwhile to check with them to ensure you won’t be slapped with surprise fees. 

Bet $1, Double Your Winnings Your Next 10 Bets
Up To $25 Max Bet Per Boost

Validated on: December 12, 2024

Claim bonus

Must be 21+ and physically present in AZ, CO, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, NJ, NY, NC, OH, PA, TN, VA, WV, WY or Washington, DC. New users only. Must register using eligible promo code. Min. qualifying bet amount: $1. Tokens max. bet amount: $25 per token. Tokens bet max. add’l winnings: $2,500 per token. Token(s) expire 14 days after receipt. Not reissued for voided/pushed bets. Void where prohibited. See Caesars.com/promos for full terms. Know When To Stop Before You Start®. Gambling Problem? CO, IL, KY, MD, MI, NJ, OH, TN, VA, WV, WY, Washington, D.C. (OLG Class A licensed Operator), KS (Affiliated with Kansas Crossing Casino), LA (Licensed through Horseshoe Bossier City and Caesars New Orleans), ME (Licensed through the Mi’kmaq Nation, Penobscot Nation, and Houlton Band of Maliseet Indians, federally recognized tribes located in the State of Maine), NC (Licensed through Tribal Casino Gaming Enterprise), PA (Affiliated with Harrah’s Philadelphia): If you or someone you know has a gambling problem, crisis counseling and referral services can be accessed by calling 1-800-GAMBLER (1-800-426-2537) or MD: visit mdgamblinghelp.org or WV: visit 1800gambler.net; AZ: Call 1-800-NEXT-STEP; IN: Call 1-800-9-WITH-IT; IA: Call 1-800-BETSOFF. Data & text rates may apply. Gambling Problem? Call 1-800-GAMBLER, MA: Call 1-800-327-5050 or visit gamblinghelplinema.org, NY: Call 877-8-HOPENY or text HOPENY (467369).

Validated on: December 12, 2024

Betting markets & odds

4.8/5

Many first-time sports bettors like to know whether their sportsbook of choice is better than another platform. One measure to compare sportsbooks is the availability of different types of bets. Here’s a preview of Caesars Sportsbook’s markets.

SportBet types
Aussie RulesFutures, moneylines, point spreads, totals
BaseballMoneylines, point spreads, totals, futures
BasketballMoneylines, point spreads, totals, futures, props
BoxingFutures, props
CricketFutures, props, moneylines
CyclingFutures
DartsMoneylines, point spreads, totals, props, futures
FootballMoneylines, point spreads, totals, props, futures
GolfWinner, futures
HockeyMoneylines, puck line (point spreads), total goals, futures, props
LacrosseMoneylines, point spreads, totals, futures
Motor sportsFutures, props, winner
Rugby LeagueFutures, moneylines, point spreads, totals, props
Rugby UnionMoneylines, totals, futures, point spreads, props
SoccerMoneylines (3-way), point spreads, totals, futures
Table TennisMoneylines, point spreads, totals, props, futures
UFC/MMAMoneylines, futures

Caesars has a lot of sports betting coverage, but ideally there would be more depth to the markets available. Many sports only have a select few betting markets compared to the competition.

Also, note that the bet types above are only a smattering of what Caesars offers, and other bets might be available for your favorite sports. For more about betting markets, see our sports betting guide explainers.

Customer support

5/5

Caesars Sportsbook offers three primary channels for customer assistance:

  • Live chat (through app or site)
  • Email (address changes based on state)
  • Help Center

Of all the sportsbooks we reviewed, Caesars had the top live chat support. Representatives are kind, fast, and helpful. Whenever an answer to a question could not be found via the help center, the live chat provided quick responses.

The email channel is helpful as well, though response times can reach up to 48 hours. 

Caesars vs. FanDuel: A brief comparison

There are a few key points in Caesars’ favor when comparing it to betting with FanDuel Sportsbook. Naturally, FanDuel gets credit where its due as well. 

Bonuses & promotions

Caesars Sportsbook’s welcome bonus is Bet $1, Double Your Winnings Your Next 10 Bets. FanDuel offers $150 in bonus bets if you wager of $5 or more and your first bet wins, as well as three months of NBA League Pass.

Both Caesars and FanDuel have a wealth of bonuses offered regularly to existing users.

User experience

Caesars Rewards has one of the best loyalty programs in the industry. You can redeem your Caesars rewards for bets, hotel stays, shopping, restaurants and more. FanDuel’s rewards program? It doesn’t exist. FanDuel only has a rewards program for DFS players. Rewards programs can be considered under the “user experience” umbrella, so Caesars gets a nice boost in this category. 

However, we did find FanDuel to have a great user experience overall, even in the absence of a rewards program. FanDuel’s layout, aesthetics and navigation made placing a bet easier and more enjoyable than on pretty much any other sportsbook.

Betting markets

FanDuel has a better variety of betting markets on any given game, and it covers more sports than Caesars does. While the odds are often comparable, the sheer variety makes FanDuel a winner in this category. 

Mobile app

FanDuel wins here, as well. We found the functionality to be the best in the industry. FanDuel’s app was quicker and smoother than any other app we looked at, and even Caesars Sportsbook’s streamlined app experience can’t beat it. 

The verdict

While Caesars trounces FanDuel in some categories, the latter still has a lot going for it, including a better mobile app and a superior same game parlay selection. FanDuel also covers more sports markets than Caesars. It really comes down to personal preference with both sportsbooks scoring incredibly well in our reviews.

Final thoughts on Caesars

After covering all of the specifics, here is how we see Caesars Sportsbook from a macro perspective.

Caesars biggest strength: The rewards program

Caesars Rewards is one of the best aspects of Caesars Sportsbook. If you plan to bet with any sort of regularity, consider Caesars Sportsbook for the rewards alone. You can even refer friends and get 5,000 Reward Credits if they sign up. 

The Caesars Rewards program offers special promos, bonus bets and access to exclusive perks and discounts. 

Is Caesars Sportsbook the best sportsbook in the U.S.?

This is a complicated question, but the bottom line is that it just might be. The reality of sports betting is that there are many apps, and they all have something their competitors don’t. Caesars Sportsbook stands out for its excellent rewards program and giveaways. Competing sportsbooks can’t quite match Caesars’ offering. On the other hand, Caesars Sportsbook’s competitors can beat it out in other areas like betting markets offered or faster payouts. 

Still, Caesars should be among your library of sports betting sites, as it is the best sportsbook out there. 

Caesars Sportsbook: A truly regal experience

Caesars Sportsbook likes to call its users “emperors,” and there’s some truth to it. Playing at Caesars makes you feel like you’re royalty. It earns a 4.9 out of 5 from us. 

The standouts at Caesars Sportsbook are its profit boosts (dozens per day) and amazing mobile app. Its frequent giveaways and highly competitive odds offerings are also commendable. 

While certain aspects of Caesars Sportsbook could improve, such as the market depth, it is still strongly recommended to any sports bettor. It is exceedingly difficult to declare one sportsbook to be the best over the others. However, we feels certain that Caesars deserves a seat at the table. 

Bet $1, Double Your Winnings Your Next 10 Bets
Up To $25 Max Bet Per Boost

Validated on: December 12, 2024

Claim bonus

Must be 21+ and physically present in AZ, CO, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, NJ, NY, NC, OH, PA, TN, VA, WV, WY or Washington, DC. New users only. Must register using eligible promo code. Min. qualifying bet amount: $1. Tokens max. bet amount: $25 per token. Tokens bet max. add’l winnings: $2,500 per token. Token(s) expire 14 days after receipt. Not reissued for voided/pushed bets. Void where prohibited. See Caesars.com/promos for full terms. Know When To Stop Before You Start®. Gambling Problem? CO, IL, KY, MD, MI, NJ, OH, TN, VA, WV, WY, Washington, D.C. (OLG Class A licensed Operator), KS (Affiliated with Kansas Crossing Casino), LA (Licensed through Horseshoe Bossier City and Caesars New Orleans), ME (Licensed through the Mi’kmaq Nation, Penobscot Nation, and Houlton Band of Maliseet Indians, federally recognized tribes located in the State of Maine), NC (Licensed through Tribal Casino Gaming Enterprise), PA (Affiliated with Harrah’s Philadelphia): If you or someone you know has a gambling problem, crisis counseling and referral services can be accessed by calling 1-800-GAMBLER (1-800-426-2537) or MD: visit mdgamblinghelp.org or WV: visit 1800gambler.net; AZ: Call 1-800-NEXT-STEP; IN: Call 1-800-9-WITH-IT; IA: Call 1-800-BETSOFF. Data & text rates may apply. Gambling Problem? Call 1-800-GAMBLER, MA: Call 1-800-327-5050 or visit gamblinghelplinema.org, NY: Call 877-8-HOPENY or text HOPENY (467369).

Validated on: December 12, 2024

Caesars Sportsbook FAQ

Does Caesars have live streams of popular sports?

In many cases, Caesars Sportsbook will allow you to stream sports from within the app or on the desktop site. This function is typically not available for tentpole leagues such as the NFL.

Which states is Caesars Sportsbook available in?

Caesars Sportsbook is live in more than two dozen U.S. markets.

Does Caesars have retail sportsbooks?

Yes. Caesars has retail sportsbooks available in various locations around the country. 

What is the minimum deposit at Caesars?

Caesars requires all deposits to be at least $10. Some methods may come with their own minimums, but $10 is the most common minimum at the sportsbook.

Is the Caesars Rewards program good?

Yes. Caesars Rewards grants players access to bonus bets, dining discounts, exclusive room rates, early ticket presales and many more perks.

Can you withdraw using PayPal at Caesars Sportsbook?

Yes. You can withdraw to PayPal at Caesars Sportsbook, but you can only do so if you’ve already deposited using PayPal.

Which is better: Caesars or BetRivers?

We like Caesars better, though both sportsbooks are good. Caesars has a better app and slightly more betting markets available.

What is the Caesars bonus code?

The exclusive Caesars bonus code is CBSDYW. This gets you double your winnings on your next 10 bets

What info do you need to sign up for Caesars?

To sign up for a Caesars account, you will need to provide your full name, address, email, phone number, date of birth, a government-issued photo ID and the last four digits of your social security number. These details will be used to confirm your age and identity as well as prevent you from creating duplicate accounts.