See below for how I typically format an email to notify the agent about their TIN invalid MIDs:
I like to set these tickets as low priority as they are maintenance work. I will also typically close these tickets after sending this email. See below for a copy and paste-able version of the template I use and I always attach a blank W9:
Hey [INSERT MERCHANT NAME HERE]
PayCompass is doing another round of monthly TIN Validation checks - I'm reaching out if an account is currently showing TIN Invalid status.
Accounts needing addressed when available:
[INSERT MID(s) HERE]
TIN Validation is usually a pretty easy process to work through. We just need a W9 form (Attached to this email) filled and signed by the merchant with exact business information they use when filing taxes with the IRS.
Please make sure Line 1 has the merchant's business Legal Name according to how they file taxes. (This may be the Owner's full name if they are a Sole-Prop filing taxes for the business under their name using their Social Security Number.)