Received a "Past due" notice from Stamps.com stating I was overdue for payment of two months for monthly fees owed (35.90)... never heard of these people. Stamps.com_ Dept 0398_ PO Box 120398_ Dallas, TX 75312-0398
"Print Postage from your PC"?

This number was in a strange mailing that I got from  stamps.com about a past due bill. I called the number and was on hold for a while.  I have never had an account with this company.