3. Features in the supply of goods
Features in the supply of goods is not mentioned in a letter of complaint.
Explanation:
When we write any complaint letter, we first introduce our self. Then after, we mention date and time of purchase along with any receipt/order number.
Later on, we mention what defect/problem, we have found in the product after the purchase and use.
We don't mention the features of the product in complaint letter.
In last, we ask for replacement or return of the product. Also, we mention courier tracking number by which we sent the product back.