LogFAQs > #962152196

This made me curious so I looked it up.

Is there a form you have to fill out first and leave with the check? I'm seeing places mention a form to go along with it. But this is cool, I didn't know this was a thing.

Edit: From your mail carrier. Get your stamps by mail; pay no fee for ordering and get free delivery to your home or office. Ask your mail carrier for a mail-order form. Fill out the form, make a check or money order payable to United States Postal Service, and mail it to the Post Office. Your carrier will deliver your stamps within a few days.

It's from this link: https://about.usps.com/news/state-releases/fl/2009/fl_2009_1217.htm But that was from 2009 so who knows if it's been updated since.