Final answer:
Adjustment letters are correspondence that inform a customer about the actions a company has taken in response to a complaint or claim.
Step-by-step explanation:
The letters that inform the buyer or customer about the action that has been taken are known as adjustment letters. Adjustment letters are written by a business in response to a complaint or claim from a customer. These types of letters acknowledge receipt of the claim and detail the steps the company has taken to resolve the issue, whether that involves a refund, replacement, or another form of correction. Adjustment letters are an important part of customer service, as they aim to rectify any problems and maintain a good relationship with the customer.