Two of the deletions that Lexington got off my Trans Union report were separate accounts with the same collection agency. In today's mail I got two mailings from this agency saying: "We heard you were applying for credit. This derogatory information appears on your credit reports. Pay the amount owed now to clear this matter." Do you think these will get re-inserted if I ignore the notice? Should I send validation letters? I'm really at a loss for what to do here.