Part of a fraud campaign targeting numerous financial institutions.  Note the pattern of shill postings all claiming the number is real - an obvious giveaway.

The large number of phony posts claiming the call is real come from some con artists spamming the site to try to fool people.  There is a similar pattern to other fake calls claiming to be from Chase, Citibank, Bank of America, US Bank, Wells Fargo, RBC, PayPal, etc. all with the same shill postings:

http://800notes.com/Phone.aspx/1-866-750-9107/12

http://800notes.com/Phone.aspx/1-302-731-1166/2

http://800notes.com/Phone.aspx/1-800-555-0433

http://800notes.com/Phone.aspx/1-800-454-9078

http://800notes.com/Phone.aspx/1-302-731-1166

http://800notes.com/Phone.aspx/1-800-669-0102

http://800notes.com/Phone.aspx/1-866-255-3409/3

http://800notes.com/Phone.aspx/1-904-954-7500

http://800notes.com/Phone.aspx/1-402-935-7733/2

http://800notes.com/Phone.aspx/1-800-830-8574

http://800notes.com/Phone.aspx/1-800-824-9289/10

http://800notes.com/Phone.aspx/1-888-800-5234

http://800notes.com/Phone.aspx/1-602-766-6484/3

http://800notes.com/Phone.aspx/1-800-824-9289/10

http://800notes.com/Phone.aspx/1-888-800-5234

What a cheap shot !  Now even THIS site is telemarketing !  Notice the above.  

Anyway, these alleged Citibank people called twice today.  Don't fall for the story that by calling them back at the CID # and having them tell you they * are * Citibank that they really are Citibank.  Crooks use masks to hide their real identity and the callers' CID name is " unavailable."  So I'm supposed to believe its Citibank,
huh ?  My .44 !

Huh.  My girlfriend is overseas at the time of this post and at 7:32 PM on 11/13/2012 I received a message on my answering machine saying hrt exact name, the cardholder, should call them asap.  Now that I read all of these complaints on this site saying its ' legitimate ' and it's bogus all at the same time, I'm left wondering what's up.

Always proceed with caution concerning such calls tho a rational person ought to know that instinctively.

I suppose one should call the # on their Citibank card and tell them you're going overseas so they don't cancel your card on you while you're away.  And your cell phone should be on their records... duh... if they're getting charges to your account from overseas you sure ain't going to answer your home phone.

And how is it my CID says the caller's name is " Unavailable " ?  Legitimate businesses don't operate that way.

They said it was Citibank on my call.  Is it true?  Not sure.

I called Citibank directly using a number on their website.  They confirmed the following:
1)  My Citibank account is inactive and has not been used in several years.
2)  No one in the fraud department made the call.
3)  The phone number is not a citibank number.

They told me to disregard the call, but that they will phone the number themselves and try to find out who is pretending to be calling from Citibank.

Got a text first from them, then got a phone call asking for a person that is not me (automated message). Called Citi they said it's not them and to disregard. I am going to.
They wanted to discuss suspicious transfer of $1k on my account.

I called the number on the back of my citibank debit card and the rep confirmed that is the number of their fraud dept and that dept did try to contact me regarding some of my citibank transactions. So it seems to be legit.

I dont even have citi bank account. this is fraud. they left me a message, i did call back without input any of my info. it ask me to enter my phone number (it is cell phone number.) earlier this month i got a few phone call from HSBC bank, which i don't have account with them also.  
i think these people are telemarketer.

I missed a call from this number at 9:54 AM on 6/19/09. They did not leave a message.

A legimate Citi bank fraud department number. But the citibank customer serivice, which I suspect located in India, did not recognize this phone number. Nontheless, this phone number did not ask for much personal info, just your zip code. This number is not listed in Citibank website -- don't know why.

got called by 800-494-6822 , call citi with the  phone number on the back of credit card, and they said it is not their phone number, they do not know who it is.  might be a  fraud.    also there are no activities on my account too,  so be careful.

I called 800-494-6822 back and it was the Citi's fraud protection verifying a charge on my son's CC. He's oversea right now, You only enter your ZIP code to identify yourdelf. They capture your phone number when you return the call and verify it against the phone number on record.

I called 800-494-6822 back and it was in fact Citi's fraud protection. It was not necessary to enter any personally identifying information, the automated system already knew who I was and only asked for my zip to verify my identity. Once verified the automated voice asked me to verify if I authorized a transaction that occurred today. That's all.

its is a fraud line! that is not a citi number!

DON'T CALL THE NUMBER LEFT IN THE MESSAGE

ONLY CALL A KNOWN GOOD NUMBER FROM YOUR STATEMENT, BACK OF CREDIT CARD OR FROM THE BANKS LEGITIMATE WEBSITE.  

That way YOU KNOW for a fact you are DEALING with the Legitimate offices and not some scammer.

how do you know?  Do you work there?

This is Citibank Fraud Prevention department you should probably call them back.