I saw a temporary sign in a supermarket yesterday, explaining that due to a technical fault "sandwiche's, toastie's and panini's" were not available. This had been hand corrected by biro, scribbling out the offending apostrophes, as is often the case. As a bonus, the terminal "s" on "panini's " was also obliterated, as panini is already a plural. Waitrose customers FTW.