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If I suspect that the Forever Stamps I bought on Facebook are fake, can my local post office tell me? - Quora

How scammers are selling counterfeit stamps on Facebook ads

Fake postage stamps are scamming holiday card senders

USPS warns of consequences of counterfeit stamps

Counterfeit Stamps

USPS Forever Stamps US Flag 2018,1 Roll of 100, Total of 100 Stamps - Stamps - New York, New York, Facebook Marketplace

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USPS Forever Stamps, Star-Spangled Banner, Roll of 100 (Fireworks) : Office Products

Beware Surge in Counterfeit Postage Stamps ​​