How do you avoid unlicensed typefaces?
You use a typeface whose licence covers the sign, print and social, and the receipt is kept with the file. A family is not installed “to try” and then left on the sign.
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Ask whether the type will go on vinyl, on the menu and on the site, because the licence does not always cover all three. The sign-maker swaps the type on installation day and the name is no longer the one on the menu. The file with the type embedded and a note of which uses are paid for.