I'm trying to repair my credit. When my wife and I bought our house almost four years ago, my credit score was around 700.. but now it's in the mid 400's, which is obviously terrible. Most of the problem is high balances (nearly everything was close to max, or at max), but I just paid off ALL of my credit cards this month (about $20k). The other negative I have on my report is three collection items, two of which are showing as unpaid. However, I have no idea what these are. In the MyFico report, it's just showing an ID number for the collection agency as opposed to the name, and the referenced account is showing as "Not on file." So how do I figure out what these are? I'm not getting any calls or letters from any collection agencies, so I really have no idea what they are. I guess I could dispute them, but if they're valid, I'd rather just pay them off.