(203) 551-5997

I agree with Jason above.This number does belong to a well reputed and one of the biggest banks of US/Northeast. There is no problem in calling them back on the number they have leave in voice mail. The return number would be a 1800 or 1866 kind of number.The Anti-Fraud and infact the entire credit card department of that bank is situation in CT.Regards,

@E: You are on the first 3 Google sites about this number saying they are fraudulent. You couldn't be more WRONG. So I'll just cut and paste this into those sites like you did.When calling them back, they know what recent transactions you've made--a fraudulent company wouldn't know this information. IOW, don't give info out to people who don't already know stuff.After talking with them my credit card is being replaced (which I confirmed after a few days by looking at your account online).I would agree that calling the number on the back of the card is better than calling some number left on your voice mail by someone you don't seem to know. But if you get this call, DO NOT ignore it. If you are getting this call, your credit card HAS BEEN DISABLED for purchases.jason.

I received a call from Jennifer with RBS anti-fraud asking me to call her back at (888) 333-0114 regarding my Mastercard. I called my Mastercard company to talk to them and they have no idea who that company is and nothing was wrong with my account. I was told not to call them back or give any information to them. They are a fraudulent company.

May 31, 2009In my case, the caller ID said "CT" meaning Connecticut, where Mastercard is based.  The caller asked for me to call back at a toll free number 888-333-0114 (which is the anti fraud dept).  I instead went directly to my Mastercard account and called the main number and listened to the voice prompts that asked if I'd been asked to return a call or letter regarding my account.  After speaking to the customer rep about a transaction they thought looked su****ious, I asked about the above numbers and the rep verified those were legitimate Mastercard numbers.  I'd still recommend dialing the numbers on your account transaction page or on the back of the actual card.

May 31, 2009In my case, the caller ID said "CT" meaning Connecticut, where Mastercard is based.  The caller asked for me to call back at a toll free number 888-333-0114 (which is the anti fraud dept).  I instead went directly to my Mastercard account and called the main number and listened to the voice prompts that asked if I'd been asked to return a call or letter regarding my account.  After speaking to the customer rep about a transaction they thought looked su****ious, I asked about the above numbers and the rep verified those were legitimate Mastercard numbers.  I'd still recommend dialing the numbers on your account transaction page or on the back of the actual card.

# called me 2

I received a call from 203-551-5997.  The person on the other end did not say anything.  However, I tried to call them back about 10 times, and they did not answer the phone.

Someone called me this morning from this number saying they are calling from my bank and have some questions our my debit card. I told them i will call back. Later I called my bank and to see there is no record of anyone calling me regarding my acccount or card.LOOKS LIKE SOME ONE TRYING TO GET HOLD OF MY DEBIT CARD INFO.Please be careful and never anwser a call from bank or credict card companies. Tell them you will call back to the bank or credict card company by yourself. Dont take number from them to call. ONLY call the number on back of your cards.

no they wont... deadbeat

Tell them you will find them and **** them if they keep harassing you. Your family does not believe in police, they take care of "situations" on their own. Guaranteed they will immedietly stop calling. Guaranteed!

Got a call from this number yes****ay,  they didn't leave a message or say anything, I am tired of getting these calls, MY number is on the DO NOT CALL LIST RECENTLY REREGISTERED.PLEASE DO SO****ING ABOUT THIS.