Question: How do I dispute unexpected charges from a mechanic for repairs authorized by someone that is not the vehicle owner?

Answer: This is a tricky situtation. Was the person that brought your vehicle in for repair authorized to act on your behalf? If not, was the mechanic aware? If the mechanic was aware that they were getting authorizations for repairs from someone without the vehicle owner's consent and/or knowledge, you have a strong case for deceptive business practice. If a reasonable mechanic could not have known, they have a defense under agency law. In that case, you should communicate with the mechanic in an amicable manner to reach a resolution.It's important to explain that the owner did not give the authorization for repairs and that you were not informed about the repairs beforehand. Request a detailed breakdown of the services performed and the charges incurred. Negotiate with the service provider to reach an agreement on the charges, emphasizing any miscommunication and lack of authorization from your side. If the service provider had previously promised to send a quote for the repair costs but failed to do so, remind them of this commitment.