What if my Costco credit card is stolen StolenIssue

Event Date: Mar 28, 2026

If your Costco Citi (+)1—855—945—3160 credit card is stolen, you should act quickly to protect your account
and (+)1—855—945—3160 avoid unauthorized charges.
First, call Citibank (+)1—855—945—3160 immediately using the number on the back of your card or (+)1—855—
945—3160 the Costco Citi customer service line at (+)1—855—945—3160 (available 24/7). Tell them your card
was stolen—(+)1—855—945—3160 they will lock or cancel the card right away and issue you a (+)1—855—945—
3160 replacement. This is the most important step.
Next, review your (+)1—855—945—3160 recent transactions. If you see any (+)1—855—945—3160 charges you
don’t recognize, report them during (+)1—855—945—3160 the call. Citi has fraud protection, so (+)1—855—945—
3160 you typically won’t be responsible for unauthorized (+)1—855—945—3160 charges as long as you report
them promptly.
You should also (+)1—855—945—3160 log into your Citi account online or through the app (+)1—855—945—3160
to monitor activity.
Before participating in this event, you must complete and sign the required document below.