Ivy, The bureaus should be ok accepting a letter even if it is only showing the last 4 of an account number. I've sent them many like this myself. They understand why creditors mask part of the number. The bureaus themselves do it as well. A human over there will easily be able to go down your list and find chase, and then quickly just verify the last 4 on the account. It will be even easier if its your ONLY Chase account. So don't worry about the CRA's not accepting the letter. I can't ever recall having that problem in 10 years or so now.
Just remember, the bureaus are like robots, they need very specific instructions and information. So make sure any letters youre sending them from creditors are specific, and stating exactly what you want them to do. If you feel something is vague or left out, inaccurate etc., then you need to get back to the OC/CA and ask them to draft out another, more specific letter.
With regards to SM, you can do one of two things. you can either fax or mail the CRA's not only the letter you received back from SM, but also a copy of the letter that you originally sent to SM regarding the lates. That way even though SM's letter is somewhat vague, the CRA's can match it to your original letter as well and fill in the blanks. It's definitely worth a shot.
OR, call back SM again and say hey you sent this letter, but its not specific enough, can someone just take a quick minute or so and mention specifically which lates are to be deleted. I've done these things dozens and dozens of times, and most places are willing to work with you until youre satisfied. If not, I always ask for a supervisor and keep pressing the issue until its resolved to my satisfaction. these are 2 very simple issues in the grand scheme of credit repair.
So Definitely work on these 2 issues because they will most certainly help your scores. Also, when you get these letters ready to send to the bureaus, call the CRA's and ask them for their fax number so you can send in a "deletion letter" . Mail will usually take a few weeks for these places to receive it and work on it. Most CRA's are behind 1-2 weeks with past mail. Faxing is always much quicker as they usually work on it within a few days, if not immediately. Any other issues along the way, let us know.
sparky =o)