I have had good luck with several of these. Including actually a couple of letters from one or two CA's saying they are basically dropping their collection activity and returning the account(s) to the OC and removing any info they have placed on my reports. A couple got nasty and filed suit though...ouch! So im now fighting two small claims as a result. My question though is; one CA, Brachfield & Associates, have completely ignored the validation letter and the request to cease phone calls to me. They continue to call me daily and even leave voicemails. I have kept records and saved the voicemails and of course I have my return receipt showing that they received my letter. What should I do now? Should I send a "2nd notice" and re-state my validation request and notice to stop phone contact? Or should I nail them with a suit? Or report them to the FTC? Or all of the above?