I'm working on submitting the registration of my airplane. I have a copy of EAA's guide, which is a few years old but seems pretty current. I received in the mail today the Form 8050-1 which needs to be filled out and the white copy sent in with the pink copy retained. So far so good. The first line of instructions on the form say "Prepare this form in duplicate". They mailed me two copies of the form. Do I fill out both copies of the form and mail in two copies of the white form? My inkling says one form is enough and that it is prepared in duplicate, i.e., the white and pink copies, but I'm not one to try and guess what government forms really mean.