"Depending on your situation, I will proofread, edit, or draft a letter of complaint for you. I am well-versed in international law, corporate law, banking law, criminal law, civil law, and federal law.
This will include structure, formal language, general language advice via track changes, and the use of persuasive language to make a convincing case.
Send me as much information about your situation as you can so we can discuss it further and, if necessary, create a custom offer to fit your needs."