How to get help with post office resupply boxes via a local TA. The easiest way for you to work with a TA to get your box. 1) Hand write and sign a note with explicit instructions for the postmaster allowing the TA to pick up the box. Include your cell phone number. Send that as a photo to the TA. 2)Write the tracking number on the letter or send photo of it, as well. 3) If you have a photo of the box, send that too 4)Send photo of your pictures ID. 5)Send photo of you holding letter and picture