What is a Business Membership? - Costco Customer Service
https://customerservice.costco.com/app/answers/detail/a_id/847/~/what-is-a-business-membership%3F
WEBTo sign up, we require some form of business identification, such as a business license, or three pieces of business ID. You can sign up online, but you’ll need to stop by the membership counter at one of our warehouse locations to …
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