No I haven't..what exactly would I be looking for?
You are looking for account charged off/ sold /transferred to another lender (this means account is bought by Junk debt buyer).
Then look at the credit pulls see who had reviewed the account, usually collector or law firms pull (soft or hard doesn't matter).
I would put a freeze on my credit to send a signal to others that my reports are "off limits" to ones who want to peek. (creditors and JDBs can review reports but it eliminates the frequency). Although, I know of one who just won't stop !
For hard copies Credit bureaus usually mail to the mailing address provided by you so if you give a new one that address will show up next time on all reports. Same for phone number.
I would also opt out of all credit offers for the next five years so none will use my information for advertisement or sell to third party (credit card or mortgage companies).