My wife paid several of this bills off about eight years ago and presumed they were paid off. When they wanted more money she did not have any proof of payment. Later on when she paid off accounts she wrote "paid in full" on the checks and that has helped later accounts and payment. But WFNNB is still trying to collect on these older bills that are way past the SL. So we refust to talk to them or pay more. But they can be a bother when they call many times a day. My question is - What can they gain from all these calls. Is it that easy to bother someone?