New Postman return remark : :  Stamp is Fake hence returned to sender

We heard about fake currency but  fake postage stamps are new way of leakage of revenue. Some countries are facing this  problem.  An internationally recognized stamp expert in Montreal says counterfeit stamps are costing Canada Post as much as $10 million annually. Montreal resident Mary Johnson found out she'd innocently purchased a counterfeit pack of 10 stamps from her local convenience store when, three weeks after mailing off a half-dozen thank-you cards, one of them came back to her undelivered.

"It had a big sticker on from Canada Post that said 'insufficient postage,'"Johnson recalls. "'You owe us 48 cents!'" // source : cbc news on counterfeit stamps//