A verbal authorization for auto repair is the phone call where the customer says yes to the second job. Some states allow it, but allowing it is not the same as asking for nothing. California, for one, says that when consent is oral the shop must note the date, the time, the name of the person who approved, the number called, the additional parts and labour, and the total additional cost. Rules vary by state, and a shop should check its own. What every shop needs is a record made at the time of the call, not a memory of it.
The second problem on the lift
The car came in for front brakes. On the lift, the technician finds a split boot on a drive shaft and grease sprayed across the subframe, and the service writer rings the customer, who is in a meeting and says "yes, fine, whatever it needs". The work gets done. At collection the invoice is a third higher than the estimate, and the customer remembers agreeing to have something looked at, not to pay for it.
The shop's file has a line on the work order: cust OK'd, 11:40. That is a real record of something. It is not much of a record of what the customer was told, and when the argument is about what they were told, that is the part that matters.

What California asks for with a verbal authorization
California's Automotive Repair Act is unusually specific, which makes it a useful example. Section 9884.9 of the Business and Professions Code starts with the written estimate requirement: the shop gives the customer a written estimated price for the parts and labour on a specific job. No charge may then be made for work or parts beyond that estimate without the customer's oral or written consent, obtained after it becomes clear the estimate is not enough and before the extra work is done.
When that consent is oral, the shop has to note on the work order the date, the time, the name of the person who approved the additional repairs and the telephone number called, if any, together with the additional parts and labour and the total additional cost. It then either repeats the same facts on the invoice, or has the customer sign or initial an acknowledgment of the notice and the oral approval when the repairs are finished.
The Bureau of Automotive Repair's regulations add the mechanics. No diagnosis or repair may begin without specific authorisation from the customer. An oral approval is recorded with the date, the time, the name and the number called; an electronic one with the date, the time, the name, and the phone number or email address contacted. The Bureau's guidance for shops, Write It Right, names text messaging as one of the electronic routes. It also says that before additional repairs begin, the shop prepares a revised work order describing the additional parts and labour and the total revised cost, gives the customer that information, and documents the approval on both the work order and the invoice.
Other states set it differently
Florida's Motor Vehicle Repair Act has a different shape. A shop prepares a written estimate for work above a set amount unless the customer declines one in writing on the form. When the actual charges will exceed the estimate by more than a margin the statute sets, the shop must tell the customer, who can then authorise, modify or cancel the repair, orally or in writing.
Other states have rules of their own. Whether a verbal authorization for auto repair counts at all, the thresholds, the forms, the notices and what counts as a record all differ, and they change. A shop should read its own state's statute, check with the agency that regulates repair shops there, and ask a lawyer where the answer matters.
What a documented approval shows that a clipboard note does not
A verbal authorization kept as a line on a clipboard shows that somebody at the shop wrote something down. Read against the California list, it leaves most of the questions open:
- What the customer was told: which parts, how much labour, what total.
- Who approved: the customer, a partner who picked up, a fleet manager.
- How it reached them: which number, or which address.
- When, relative to the work, which is the part the rules care about.
"OK'd" does not say what was OK'd, and "cust" is not a name. Approval is meant to come before the extra work, and a time written in afterwards can say anything.
A documented approval answers each of those from the record itself: the revised estimate the customer actually saw, with the items and the total; the name they gave; the time; the number or address it went to; and a separate act of approving, made before the work began. In a dispute, whether with the customer directly or through their card company, that is the difference between two recollections and one document.
A job can collect several signatures this way: the repair authorization at drop-off, each supplemental, perhaps an acknowledgment at collection. The order they happen in is part of the record, and who signs last covers why that order carries meaning.
Sending the supplemental estimate by text
The phone call is the habit because it is quick. A text can be as quick and leaves more behind. The service writer writes the supplemental, with the additional parts, labour and new total, and sends a link to the customer's phone. They read it in the meeting, sign, and the technician carries on. What they saw, when, and from which number is part of the record without anybody writing it on a clipboard. Auto repair authorization by text is the phone call with its details kept, and a repair estimate e-signature is the customer's own act rather than the shop's note about it.
Two conditions apply. The customer has to have agreed to receive texts from you, which is best asked at drop-off, when the number is taken; our page on sending a signing link by text sets out what that involves. And customer approval for additional repairs works best as its own document each time, rather than an edit to the last one: the same principle as a change order on a building job.
How this works in SignSealer
An account set up for auto repair and towing starts with two documents. The repair authorization covers the vehicle, the repair order, the work, the estimate and an overage allowance, says the shop will stop and contact the customer before going further, and treats each additional amount as its own supplemental authorization, with a note for your attorney on what your state requires in an estimate and whether an oral approval is enough. The tow authorization records who is authorising the tow and on what basis, the condition and photographs at pickup, and who the vehicle may be released to.
The estimate amount can come from your shop system through the API. SignSealer sends a text only where you have recorded consent for that number, with the purpose, the source and the wording. Without it the message is marked suppressed, with the reason, and the document can still go by email.
SignSealer is not a law firm and this is not legal advice. Repair-shop rules differ by state and change; what your estimates and approvals need to contain is a question for a lawyer or the agency that regulates shops where you work.

