Perhaps the buyer found out this was not live ink and returned it? (Which would explain why it keeps popping up on sketchy auction sites like IAA - Barcelona) and has no LOA or COA with it.
I think I’ve already mentioned this - but I went to view this in person and I could have sworn it was live ink. You can also see on the Lennon signature where the indentation of the pen on the flip back was, and where the ink didn’t stick. Maybe Lennon is good and Harrison a stamp? Both looked the same to me. I might even have pictures I took at the time.
When I looked at it it was at Thomas Watson auctioneers in the UK. There was a Ringo signed PPM (looked like a 00s fan mail send in) and a period correct signed PPM by Paul and Ringo, both had Epperson certs. All consigned by the same person. Weirdly the EP was the only one that sold, the other two had estimates that were too high (2k and 3k I