Citibank is calling you from 877-836-5629. They are contacting you because the collections division at Citibank has matched your phone number with a past due Best Buy credit card account.
The number is used exclusively for Citibank's customer billing and recovery division for the Best Buy Visa credit card and Best Buy store credit card.
The issue is that this number is not listed anywhere on Citibank's or Best Buy's official customer service contact page. The number appears on your caller ID without any identifying information, it rings several times a day and leaves a generic voicemail. For thousands of consumers, it calls you even when you don't have a Citibank account.
Company Information
Company Name: Citibank N.A.
Parent Company: Citigroup Inc.
Type of Entity: First-party creditor (the original lender, not a third-party debt collector or debt buyer)
Industry: Banking and financial services — credit cards, personal loans, mortgages, auto loans
Headquarters: 388 Greenwich Street New York, New York
Company Size: 226,000 employees across 180 countries; $2.657 trillion in total assets
CEO: Jane Fraser (as of March 2021)
BBB Rating: D- (not accredited by the BBB)
CFPB Complaints: 136,000 total complaints filed between 2012 and 2024
What Regulators Already Know
If you think that the calls from this phone number are harassing, you're not alone. In 2024, Citibank agreed to pay $29.5 million to settle a Telephone Consumer Protection Act (TCPA) class-action lawsuit after a federal judge ruled that the bank had made millions of pre-recorded robocalls to cellphones of non-customers without their consent.
In 2016, the Consumer Financial Protection Bureau (CFPB) ordered Citibank to stop collecting about $34 million in credit-card debt after the bank sold accounts to debt buyers with inflated interest rates and hired law firms that altered sworn court documents in collection cases.
Why Is Citibank Calling Me?
The Best Buy Credit Card Connection
This phone number has been assigned to Citibank's in-house collections division for Best Buy credit card accounts. Calls from 877-836-5629 usually start once an account is 30 days or more past due and increase in frequency as the delinquency ages. Citibank handles all its collections in-house for the first 180 days before they may assign accounts to third-party agencies such as:
Enhanced Recovery Company
CBE Group
AFNI
After the account is charged off at around six months, Citibank may sell the debt to companies like:
Midland Credit Management
Portfolio Recovery Associates
LVNV Funding
If you ignore calls from 877-836-5629 now, you may eventually hear from a completely different company with even fewer consumer protections.
Wrong Number, Same Harassment
Many of the complaints filed about this phone number are from consumers who don't have a Best Buy credit card account or any other Citibank account. One consumer posted this on Tellows:
"Caller states with Best Buy Visa and I'm late on my bill. I don't have a Best Buy Visa."
Another consumer posted this on ShouldIAnswer:
"Asked for a different person. Told them they had wrong number, which they did."
These wrong-number calls are not one-off mistakes. They are a function of the robo-dialing practices that were at the heart of the $29.5 million TCPA settlement, in which the lead plaintiff Christine Head received more than 100 unsolicited robocalls in three months about someone else's debt.
Their Favorite Pressure Points
The Urgency Script
Calls from 877-836-5629 are designed to create a sense of urgency. The voicemail message asks you to "please just take a few minutes" to discuss your account status, which makes the call seem innocuous when in fact there's a hidden agenda — pay now or else.
If you connect with a live representative, the urgency escalates. Several consumers have reported being told that their account will be sent to a collection agency or that their credit score will be affected or that they may face legal action. All of these are pressure points to get an emotional reaction from you that results in making an immediate payment over the phone.
The reality is that you have more rights under state and federal law than you realize, including wage garnishment thresholds and income exemptions and lawsuit filing requirements that collectors won't tell you about. The urgency is in their commission structure, not your liability.
The Identity Verification Trap
One of the most insidious practices with calls from this phone number is that the caller asks for identifying information from you before providing any meaningful information about themselves. One consumer posted this on 800notes:
"They say they are Citibank for a Best Buy Card and they have information on the month prior payment, and they know the balance due, and then they want to verify you with your DOB and last 4 of your SS and they hang up when you won't provide that."
That's exactly backwards from how an identifying call is supposed to work. Any information you give a debt collector can (and will) be used against you. Information should flow one way — from them to you. Never provide personal data, account numbers or employment information when you receive an unsolicited phone call that you didn't initiate.
What Consumers Are Reporting About This Number
The Robocall Machine That Never Stops
RoboKiller has recorded almost 1.8 million total calls from this phone number, with more than 3,700 user reports. ShouldIAnswer has 82 negative reviews out of 93 total. Nomorobo classified the number as a robocall and blocked it in March 2018, but the number was still active as recently as February 2026.
Consumers report that the calls follow a robo pattern. One consumer on 800notes kept a log:
"Called on 4/3 at 8:32 AM, 11:33 AM, 2:35 PM and 5:37 PM as well as today on 8:03 AM, 11:04 AM, 2:31 PM and 5:32 PM."
Other consumers report calls every day of the week, including Sundays and holidays, with up to ten calls in a single day.
When Blocking Does Nothing
Perhaps the most maddening complaint about this phone number is that blocking the number does nothing. One RoboKiller user reported:
"Blocked the number but they continue to call at least 3 times a day for the last 2 wks. Phone only rings once since they were blocked but it has not stopped them from continuing to call."
Other consumers have noticed that when you block 877-836-5629, calls start coming from a different number in the same series like 877-836-5643. This is a favorite tactic of robo-dialers who want to circumvent blocking technology and a red flag for consumer protection attorneys who handle Telephone Consumer Protection Act (TCPA) cases.
Why You Should Never Call Them Back
Direct Contact Gives Them Leverage
Your first point of contact should never be with the debt collector. The voicemail from 877-836-5629 asks you to visit bestbuy.accountonline.com or call them back. Both approaches land you on the phone with a representative where you're at a disadvantage.
Once you engage, anything you say — even acknowledging that you owe the debt — can restart the clock on the statute of limitations or be used as evidence against you.
You should talk to a credit repair expert before you have any direct contact with a collection agency. The Fair Credit Reporting Act (FCRA) and the Fair Debt Collection Practices Act (FDCPA) have nuances and procedures that require expertise to navigate correctly. A single misworded sentence in a letter or a phone call made out of anger can erode rights that you didn't know you had.
The Credit Report Is Where the Real Battle Happens
The best way to respond to illegal collection calls is not by calling the collection agency back. It's by filing a properly executed dispute with the credit reporting agencies through the FCRA.
When a collection account is successfully disputed and removed from your credit report, the removal is permanent. Collection agencies usually do not have the documentation or financial incentive to re-report a debt that has already been removed through the dispute process.
That's especially true of high-volume creditors like Citibank, which the CFPB found had sold accounts to 16 different debt buyers with inflated interest rates and incomplete documentation. When the original creditor's records are shaky at best, the dispute process becomes even more powerful.
Minimizing the amount of information you share during the dispute process is critical. Every shred of data you provide to a debt collector becomes a permanent part of your file. The less you give them, the less ammunition they have when your dispute forces them to verify what they have already reported.
Conclusion
Calls from 877-836-5629 aren't going away. Blocking the number only leads to more numbers. Ignoring the calls only leads to third-party debt collectors and debt buyers. Calling them back only leads to tactics designed to get money and information from you.
The strategy that actually works is a targeted credit report dispute handled by an expert who knows how to wield the full power of the FCRA and FDCPA. Citibank's history with regulators, including billions of dollars in fines for bad records and illegal debt collection practices, tells you everything you need to know about the quality of records behind these calls.
Your Next Step
If you're getting harassing calls from 877-836-5629 and you'd like them to stop, the experts at FightCollections.com can help. We specialize in disputing inaccurate and unverifiable collection accounts from your credit report using the full protections of the FCRA and FDCPA.
Don't return the call. Contact us first and let us evaluate your situation before you do anything that might jeopardize your rights.
