I had a $29 collection from Sprint to a CA named "Park Dansan" showing on Ex and Eq.
Sent PFD letter on 8/16/07. Never received response.
On 9/1/07 the entry disappeared from Ex. On 9/4/07 it was gone from Eq.
Not sure why they just deleted, I was offering to pay... oh well. I'm very excited that I was able to get one of my two derogs removed!
Posting this so anyone searching for this CA can read my experience with them. Thanks for all the advice people contribute to this site.