[PJ]

Someone from the post office stamped (or put a "return to sender, wrong address" label) on 2 of my credit card bills, but they were addressed correctly.
When I tried to use the credit card, it was rejected. I've never had this happen before, so I called the cc company. The cc people said that they had received my bill/statement, that was returned to them by the P.O.

They verified it was addressed correctly, and explained this caused my cc to be declined at the store. I think it's all straightened out now, but I can't figure out why this happened.
Do any of you have any idea why the P.O. would return some of my mail, but deliver the rest of it.
Has anyone else had this happen?