To fill out this letter, clearly write your name and address at the top. Include the date and the collection agency's name and address.Learn how to write an effective collection dispute letter with our guide and templates. Download a free pdf version of sample letters to dispute with credit bureaus and negotiate a payment plan with creditors. Request to begin debt settlement negotiations. If the collection agency or creditor rejects your offer, don't lose hope. This blog is the perfect place to learn how to write a debt settlement proposal letter. How to use this sample letter: 1. Read the background below. 2. At any time after the pleading is filed and served, any party from whom monetary recovery is sought may request in writing that the party seeking recovery.