Is there something inside packet 3 that must be signed and returned? We have downloaded all the forms from the website and are getting ready to mail them (he is currently in the U.S. visiting). to his parents. He was going to have his parents include the checklist with the pack and then mail it to the embassy. Does anything need signed that we can't get from the Germany Embassy website?

All the forms from the Frankfurt website are the same. You send all of that and the checklist (when you have everything) back.