Today, day 16 after estoppel, I get another letter from them. Again, not CRRR, they don't know I got it, and it's the exact same thing as the first time. Still, not listed as disputed, but they want to collect. Does a printout of a phone bill constitute validation? What's the next step for this? Thank you to all who have previously helped. I've managed to get rid of 9 accounts - only a few more to go!