I recently found out (eleven months after the fact) that someone charged over eight hundred dollars on my Montgomery Wards account! I have been paying without looking at my monthly statements and just noticed that not only was my identity was stolen, but the new purchases are showing up on a new account number too.

It had to have happened at a Post Office box place where we had keys to let ourselves into the office after closing time.

Wards informed me that they will "investigate" but I think that I had better do something to help myself. What should I do?

Notify and call the police, Wards will have to have this on file.

Notify the credit reporting agency of this and put a fraud alert on your file.
And of course I will assume wards has cancelled your card at this point and time so no further usage can be done.

Same thing happened to my mom in law, same store and po box!