Ah, memories ... wait, I don't remember

My sister mailed me something she found in an old book that apparently hasn't been opened in more than 20 years since she took it from the house we grew up in. Note the memo on what the check is for.



Apparently no pictures or negatives were found in the vicinity of the check, and for the life of me I can't remember what the gag was. Man, I'm getting old.

Anil, if you're out there, I guess it's safe. I've got nothing on you.