Originally Posted by Barry-xlovecam

If it's a US Sponsor the IRS or the Department of Labor is looking at his books.

Either that or that sponsor is checking TIN numbers

"e-Services is a suite of web-based tools that allow tax professionals and payers to complete certain transactions online with the IRS. The tools include Registration Services, e-file Application, Transcript Delivery and TIN Matching. These services are only available to approved IRS business partners as noted below and not to the public.

Authorized business partners who need assistance using the online tools can contact the e-help Desk at 1-866-255-0654. International callers must dial 512-416-7750."