We begin with responding to the customers' TPRM questionnaire, which should include details about our TPRM program.
If they still request access to 4th party DD materials, we advise them that these are only available through Multi-party NDAs. Very few of our requesting customers have proceeded to execute all the needed Multiparty NDAs to secure the requested nth Party DD materials.
To be candid, I'm surprised when my Third Parties tell me they have never been asked for permission to share their DD materials before.
I hope that doesn't that mean most of our peers are disclosing Confidential Information, in potential violation of their agreement(s) with their vendors.