If you often stumble upon the misspelling "rsvp's", there are a few correct alternatives you can use instead. Firstly, you can write RSVPs, omitting the apostrophe altogether. Secondly, you may consider writing "RSVP's", placing the apostrophe after the 's' for possessive purposes. Ultimately, it's essential to respect proper grammar and punctuation when using this commonly misunderstood term.