Well, the easiest way is to not use the matching forms at all, and you just put in your letter writer's email address and AADSAS sends them a link to a page where they attach the word document of your letter and presto, all done.
But, if you need to do the matching form, it's just like the transcript matching form - you indicate that this will be a paper submission instead of online, and then it lets you print out a special form with a bar code and your information on it. Then you give it to the person writing your letter and they including it in with your letter when they mail it in.
You'd really need to give the forms to the people so they can send them out themselves if you're not doing it online, because you more or less need to waive the right to view the letters for all of them, or else the schools might not look at them as seriously.