Crossword Answer postcard

Here are all the crossword puzzles and clues where the answer postcard appeared.

Clue
Puzzle
Date
Mail that doesn't need an envelope, and where both words of 12-, 20-, 34-, and 51-Across can be found?
LA Times
Nov 6, 2023
Send this when on holiday
Metro Quick
Sep 13, 2023
Vacationer’s mailing
Eugene Sheffer
Jul 26, 2023
Souvenir shop purchase that is often mailed
Daily Themed Crossword
Feb 4, 2023