Membership required: Costco to scan member cards, check ID at all locations - USA TODAY

* Membership required: Costco to scan member cards, check ID at all locations  USA TODAY
* Costco's inevitable crackdown on membership sharing has arrived in California  SFGATE
* Costco rolls out new membership card entry scanners  KTLA Los Angeles
* Costco members will have to scan membership cards upon entrance  KING5.com
* Costco makes big change for shoppers entering stores  AL.com


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