‘They’re way too strict’: Costco customers use family card to grocery shop in-store. It backfires

One Costco manager shocked two sisters when they tried to check out at the register.

Listen up so this doesn't happen to you.

Costco is a membership-based establishment, meaning customers must hold a valid membership card to enter the retailer and check out. Multiple stores have the same member model, including BJ's and Sam's Club, which, like Costco, sell items in bulk.

Some people are starting to sour on Costco as the company has been cracking down on people sharing membership cards.