Which address? 

The law says I have 30 days to respond and dispute a debt but I must mail the debt collector a dispute letter. 

In the collection letter XXXX of XXXX, AL there are XXXX different addresses on their letter, which XXXX do you use? 

If you do n't respond to the correct address the collection firm assumes the debt is valid. To protect yourself you must mail all three addresses. 

That is ridiculous. All debt collection agencies should be required to clearly print their name and address used to receive disputes printed using same font and size as the largest type used in the letter. 
