Can a Debt Collector Refuse to Respond to a Debt Validation Letter?

Q&A: I Changed My Name, Will Debt Collectors Find Me?

Does Getting Your Car Impounded Hurt Your Credit Scores?

Q&A: Collection Agency Keeps Updating Credit Report--Does This Hurt My Score Each Time?

Q&A: How to Fix Credit Before Refinancing Second Mortgage

Can My Credit Report Have More Than One Collection for the Same Debt?