ELI5: Explain Like I'm 5

Form letter

A form letter is like a special piece of paper that has information already written on it so you don't have to write it all out by yourself. It's like a template that you can use to say the same thing to different people without having to write it all out each time. This saves you time and helps you make sure you're giving everyone the same information. It's kind of like sending a birthday card with a pre-written message inside, instead of having to write a unique message on each card.
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