A customer service Costco number is a unique identifier assigned to customers who have an account with the Costco wholesale club. It is typically a 10-digit number and can be found on the back of your Costco membership card or on your Costco account online.
Your customer service Costco number is important because it allows you to access your account information, make purchases, and get help from customer service. You can use your Costco number to sign in to your Costco account online, over the phone, or in-store. You can also use it to track your orders, view your purchase history, and manage your membership.
