How To Write A Letter Of Complaint To A Company. The first thing you need is the address of the company/person. Attach copies of the necessary and relevant documents.

Formal complaint about [name of service provider] dear mr/mrs/ms [name of the firm’s contact] i am writing to make a formal complaint against [name of individual who provided the service]. Pay attention to the complaint letter format, the voice, and the use of language. Continue writing something like, “because of several incidents that have occurred between her and me, i feel that it is time to make an official complaint.”.












