Tell us who sent it and what kind of letter it is. We'll explain it in plain English — what it is, how serious, what they want, your rights, the deadline, and the safest next step. No jargon. No panic. No legal essay.
Pick the sender. You'll then choose the specific letter type. If you're not sure, pick the closest one or look at the logo and address at the top of the letter.
Pick the closest match. If you're not sure, look at the title at the top of the letter, or any reference numbers and statutory references it quotes.