A note on personalised US stamps
Personalised US stamps were marketed not as "stamps" but as "U.S. postage" and sold by companies authorised by the USPS. The service started in 2004, and were dicontinued in 2020. We have seen stamps from Endicia.com, PictureItPostage, Stamps.com, and Zazzle.com (stopped offering stamps in 2018). Personal Postage could be re-ordered many times in different denominations.

We list only stamps we have been assured have actually been made or ordered, and prefer scans of used or mint actual stamps. Most often we will, however, only receive screenshots of prototype designs from correspondents for security reasons. Please only submit stamp designs you know have been actually made, to scans@catstamps.org.