877-275-3819

Legitimate.  They left a voicemail message saying it was Chase credit card security and they had noticed possibly fraudulent charges on my account.  I called their published number and verified that the call was legitimate.

I received a voicemail from Chase credit card security about fraudulent activity on my account.  I had also received three emails from Chase during a one hour period with the last one arriving approximately one-half hour before the phone call.  Each one said that a specific transaction had been declined.  I had signed up for several types of email alerts just two weeks ago on their website.  The combination of phone and email notification helps confirm their identity.

Chase credit card calling about a fraudulent charge on my card. Fraudulent charge indeed had been made to FTD florist for $98. Cancelled card.  

This seems to be a legitimate number for Chase Fraud prevention as the other posts have noted. What is interesting in my case is that, in the name of security after the Target attacks (and others), I received a replacement card with an embeded chip on Monday evening in the mail to replace my previous "magnetic strip" card that never had any fraud issues.

I activated it Monday night from home and put it in my wallet. I never removed the card after that and on Tuesday morning, less than 30 hours after activating the card, it had been attempted to be used in four fraudulent transactions outside of the State I reside in. That tells me they have a mole. Somebody at the plant these are made at or within Chase had to know my numbers (front and back) and when the card was activated. Or else they were extremely lucky to guess all that. No restaurant staff or online web site or anybody else got my card number from me.

This number is legit but you should always call the phone # on the back of your credit card just to be safe.

I got an email from Chase (at least it looked legit from Chase, had my full name and last four of card number) showing fraudulent charges and a green YES and red NO button asking if they were legit charge. As soon as I pressed the NO button, I got a call from this number. It had me on hold though, so I hung up and called the fraud number listed on their web site and found it was legitimately asking about the illegitimate charges and that the number I was called from was their number after all.

Got the same, a new card I got 3 weeks ago, got frauded. Never left my wallet as I am using it to buy online only.