You may get a variety of feedback letters for free right here. Feedback is a response to a transaction, a trade, a conversation, an occurrence, or anything else linked to it. It might be referred to as a statement, a response, an observation, or an agreement. The most common type of feedback letter is the complaint letter because it gives the recipient information about a problem or issue with something such as quality of product, service, or business practice. Complaint letters often include details about what was wrong or how it could be done better next time. The recipient can then use this information to fix the problem or improve their experience. Other common types of feedback letters include the testimonial or endorsement letter, which is written by someone who has used your product or service and offers his or her opinion of it; and the reference letter, which is used to ask for a job opportunity or referral. Endorsement and reference letters are usually sent after the fact, when the person offering the feedback has had a chance to think about it. He or she may even have another project or customer that needs attention first before writing back. It's important to remember that not all feedback is given freely. If you don't give permission first, you won't receive any feedback at all.