I just found the following:
https://www.bankersonline.com/forum/ubbthreads.php/topics/1933534/Providing_the_Credit_Score_ExcIn case anyone needs this information I did find the ABA doc that I was looking for that referenced this matter:
ABA Staff Analysis: Final Rule on Credit Score Notices July 2011
5. If the applicant and any co-applicant reside at the same address, may the lender provide both credit scores in the same notice?
No. Whether the consumers have the same address or not, the lender must provide a separate notice to each consumer if a notice includes a credit score. Each separate notice that contains a credit score must contain only the credit score of the consumer to whom the notice is provided and not the credit score of the other consumer. The reason is privacy. If the notice does not include a credit score, separate envelopes are not necessary for co-applicants residing at the same address.
6. May the separate notices of joint applicants be inserted into a single envelope?
There is nothing in the final rule that prohibits a lender from inserting notices to each applicant into separate envelopes and then inserting those envelopes into a single envelope addressed to one address. The �insert� envelopes containing the notices should be addressed to the appropriate recipient.