Invitation notation

This time we are looking on the crossword clue for: Invitation notation.
it’s A 19 letters crossword puzzle definition. See the possibilities below.

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Possible Answers: RSVP, BYOB, CASUAL.

Last seen on: –Eugene Sheffer – King Feature Syndicate Crossword – Jun 13 2022
The Washington Post Crossword – Jun 2 2019
LA Times Crossword 2 Jun 19, Sunday