Let's review the O.P.s link shall we? According to the person who submitted this the letter from Morse stated:

Enclosed is a postage paid envelope for your contribution along with a simple form that must accompany your gift. We will gather all of these forms and contributions and present them to Mitt and Ann ... letting them know that "The Villages family" is "all in" as we work together to change the future of our nation!

In other words, yes the employees need to show "him" (the organization) the form and the check apparently.