800-955-5172 / 8009555172

call today from 800 955 5172 - Fraud Dept saying suspicious activity on my account and to call them back.I used back of Citi Card 800 number - they verified it was happening- and closed my acount after verfying a few things. At lease someone is watching. !!!! Least they can do is show Citi in caller name !!! otherwise we all think it is a scam . I just happenend to think i should check this one out.

It's a legit number from Citibank fraud department. I wasn't comfortable giving them my info and they suggested I call the number on the back of my card and were completely understanding. It's a trustworthy number.

Yes, this number is from Citibank fraud department. We have received call yesterday to let us know about suspicious fraudulent activity and I confirmed with Citi customer service department.When Citi representative called from 800-955-5172 number at our home phone, did not put name of the account holder. In this case, it is complicated if you have more than one individual city credit card accounts in a household with different names (i.e., in name of husband, wife, son etc). and you have given your common house phone number.

The vm told it was call from CITIbank，but the call ID was NOT say CITIBANK，it was just show ＂toll free number ＂（no name），I can't trust them !

Received a call from 800-955-5172 also warning me of suspicious activity on a card that I have not used in over half a year. Sure enough I checked on my account and saw the unauthorized activity on my card. But here's the interesting part, when I called it was for a sweepstakes company and I knew right away this was not right. I don't know how that happened but it's quite smart of the scammers to post activity then have you call them at the number they give you to get more information from you.

these scammers keep calling,now a "fake" letter!! from my credit card co.--fake.

I received a letter in the mail saying "We're concerned about potentially suspicious activity" it says to call 1-800-955-5172. In the letter. They said they can't find my account so he nervously asked if it's okay with me if give them my social security No. I refused to give my social No. But I did give my name address and 16 digit code. THE NEXT DAY I RECIVED A CALL SAYING MY ACCOUNT HAS SUSPICIOUS ACTIVITY. Luckily the "real" Fraud protection agency were doing their job and put a stop to each transaction that wasn't in my home state.

Never give out ANY credit card information to callers. If there is a question regarding your account, call the number on the back of your card.

We're concerned about potentially suspicious activity on your Citi® Hilton HHonors™ Visa Signature® accountWe're concerned that some recent transactions on your account might not have been authorized by you. We tried to call you to verify these transactions, but didn't reach you. To protect your account, we need to confirm this activity with you.Call us to verify your transactionsPlease call us right away at 1-800-955-5172 so we can review your recent transactions and determine if any were unauthorized. If you're out of the country, you may call us collect at 1-301-714-5302.Until we hear from you, merchants may ask to verify your identity before they approve a transaction using your card.If you've spoken to us about your transactions within the past few days, there's no need to call again. We might have sent this notice just before speaking with you.

Citibank mailed a letter to me because they said they can not reach me via phone, want to verify charges.They know what kind of card I have (Citibank Business) and my phone number on file.So it is legitimate number.