mail art is cool!
i have tried “testing” the postal service with my own stamp issues, postmarked by my own mark, by placing them as close to the required US postage to see what might be rejected. as long as i don’t take up the top right area, i can almost get the USPS to postmark my stamp as well.
funny one was when the USPS turned my mail upside down and placed the “official” postmark nowhere near either stamp!
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