Costco Shop Cards can be used by members and non-members alike to shop at the warehouse club's stores and online.

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Next time you head to Costco, make sure you have your plastic or digital membership card – and a matching ID. The members-only warehouse retailer is really starting to crack down on non-members.

The family-favorite retailer is changing the way it verifies membership. Have you been using a friend’s Costco membership card to get two-liter jugs of olive oil, pallets of toilet paper, or ...

Kevin has been writing and creating personal finance and travel content for over six years. He is the founder of the award-winning blog, Family Money Adventure, and host of the Family Money Adventure ...