Videomaker – Learn video production and editing, camera reviews › Forums › Specialty Topics › Legal Issues › Client wants to give another business authorship of video › This is more than “slightly”
This is more than "slightly" messy. Get a lawer to resolve this. I doubt that you can do it yourself. Do not put anything more in writing — not letter, no text, etc., until your lawyer has looked at the contract. The key to it all is what's in your contract and it sounds like it will require a professional to establish the limits of that.