Question: How do I activate the Citibank Costco Credit Card?
Answer: There are two (2) ways to activate your new Citibank Costco Visa Credit Card
The first way to activate the Citibank Costco Visa credit card is by calling the Citibank Costco dedicated activation telephone number: 1-866-241-8684 (Citibank Costco consumer card) and 1-866-242-2926 (Citibank Costco Business card).
The second way to activate Citibank Costco credit card is by registering at Citi.com/CostcoSetup. The site will login to your Chase account to activate your new card.