Scammers are always innovative and often great liars. A+ for ingenuity and an F+ to anyone who sent in their card. Malwarebytes Blog has the story. The scam if true, (after all it was posted on social media,) goes like this. Certain Barclay customers received a postal mail that claimed their cards could explode and urged the recipient to return them to a factory located at an address in India. Of course, they needed the PIN for replacement."
“We feel compelled to relay the dire warning from this Barclays snail-mail letter, which we acquired through social media. Therefore it must be true.”