Form letter

letter which is prepared with a uniform formula and is intended to be distributed to a group of people

A form letter is a letter written from a template, rather than being specifically composed for a specific recipient. The most general kind of form letter consists of one or more regions of boilerplate text interspersed with one or more substitution placeholders.Although form letters are generally intended for a wide audience, many form letters include stylistic elements or features intended to appear specifically tailored to the recipient — for example, they might be signed by  autopen and utilize computer programs to automatically insert the names of individual recipients.
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Noun
1. a letter that is printed in multiple copies and mailed to a list of recipients
(hypernym) letter, missive

form letter
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