It should be addressed to the Trafic authority
Sub : Consent to Car Registration
We, (Company) state that we have given consent to our employee (name &ID No) to own a private vehicle.
COMPANY NAME & SEAL
well if ur talking about letter english then i don't think it is accepted in government. in my company all letters for governemtn or ministery have to be ARABIC ONLY! even college degree we translate to arabic. so my advise is make sure u can in english.