Guide

How to write a repair authorization that holds up

You cannot write a document that guarantees you win an argument. You can write one that makes the argument very unlikely.

The short answer

A repair authorization is the record of what the customer agreed to before you started. The versions that work are specific about four things: which vehicle, what work, what it will cost, and who said yes and when. Everything else in the document is supporting detail.

Get it before the work, not after. An authorization signed at the end of a job is an invoice with a signature on it, and it records agreement to something that has already happened, which is the opposite of what it is for.

Then handle the middle of the job the same way. Most disputes in repair are not about the original agreement, they are about the extra work that was found once things were apart. A second short authorization for the extra, recorded the same way as the first, is what prevents almost all of them.

This page describes what these documents commonly contain. It does not say what your state requires, and no wording here is promised to hold up anywhere. Some states have specific rules about written estimates and about exceeding an authorized amount, and those rules are the ones that actually govern your paperwork.

What the document is really for

The instinct is to think of an authorization as protection for a fight. It is better understood as a way of making sure two people leave a conversation with the same picture in their head, because that is what it does on the many jobs where nothing goes wrong at all.

A customer describes a symptom. You describe a repair. Between those two sentences sit a dozen assumptions about what is included, how long it takes, whether the part is new, and what happens if it turns out to be something else. Writing it down forces those assumptions into the open at the only moment when they cost nothing to resolve.

That is also why a vague authorization is worse than none. A line reading "fix noise from front end" and a signature underneath records that somebody agreed to something, and gives no help at all in working out what.

Specific beats formal

People assume a document works better if it sounds like a lawyer wrote it. In practice the thing that prevents disputes is detail about this job, not general language about liability.

The vehicle identified precisely, including the plate and the mileage at the time. The complaint in the customer own words as well as your description of the work. The parts named. The price separated into labour, parts and anything else, rather than one total. A date. That combination is what makes it obvious months later what was actually agreed.

Boilerplate has its place, particularly around storage, warranty and what happens to old parts. It is just not the part that decides most arguments, and a form that is all boilerplate and no specifics is the common failure.

Written approval works better than a signature on paper

For mobile work, chasing a physical signature is awkward and frequently ends with nothing being recorded at all. A written approval the customer sends back, from an address or a number that is plainly theirs, with the actual figures visible in what they were replying to, is usually easier to obtain and easier to produce later than a scribble on a page that has since been in a van.

What matters is that the approval can be tied to a specific version of the numbers. A reply saying yes is only useful if it is obvious what it was a yes to, which means the price and the scope have to be in the message rather than referenced from a conversation.

Whether a particular form of approval satisfies a rule in your state is a question for your state, and some do have specific requirements about how authorization is obtained and recorded. That is worth checking once, properly, rather than assuming either way.

What people mean by a form that holds up

When a mechanic searches for an authorization that holds up, they are usually imagining a document that wins. That is not something any form can promise and not something this page will claim. Whether paperwork carries weight in a real dispute depends on the rules where you work, the facts of the job, and frequently on somebody neither of you has met.

What is within your control is narrower and more useful. A record holds up in the practical sense when three things are true of it. It existed before the work rather than after. It is specific enough that a stranger reading it can tell what was agreed. And the customer clearly saw it, because a term nobody read is a weak thing to rely on whatever it says.

Those three are worth optimising for directly, because they are also what prevents the argument in the first place. Almost every repair dispute begins with a genuine misunderstanding rather than bad faith, and a document that removes the misunderstanding never has to be tested.

It follows that the effort is better spent on the ordinary case than on the rare one. Making it easy to send a clear estimate on every job, and easy for the customer to approve it, does more for you than a long set of clauses used on the one job a year that goes badly.

And where the amounts are large enough to matter, the correct move is not a better web page. It is showing your actual paperwork to somebody qualified in your own state once, and then using what they tell you.

The parts an authorization usually has, and what each one is doing

A description of what these documents tend to contain. Not a template, not a list of requirements, and not advice about which of these you need where you are.

Identification of the vehicle and the customer. Plate, make, model, mileage on the day, and how to reach them. Mileage matters more than people expect: it dates the work in a way that helps everybody later.

The complaint, in the customer own words. Recording what they said, rather than only your interpretation, is what makes it possible afterwards to show that you addressed the thing they asked about.

The work to be performed, described in enough detail to be recognisable. This is the section that decides most disagreements, and the difference between useful and useless is usually one more sentence.

The estimated price, broken into labour, parts and any separate charges. A single total invites the argument about what was included.

What happens if the job turns out to be bigger. Documents commonly say that additional work will not be performed without further approval, and describe how that approval will be requested. This is the clause that matters most in practice, because mid job discovery is where repair disputes actually come from.

Warranty terms, stating what is covered and for how long, and separating workmanship from parts. Where a part came from the customer, that distinction matters even more.

Old parts and disposal. Whether the customer wants the replaced components back, and who pays for disposal of anything hazardous.

Diagnostic terms, saying whether the diagnostic charge stands alone or is credited against the repair, so that the answer is not invented later.

The approval itself: who agreed, when, and by what means. A date and a name attached to a specific version of the numbers is the part that turns a description into a record.

Where the short answer stops being the answer

Every rule on this page has a situation it does not survive. Here are the ones worth knowing about before you meet them.

You find extra work once the vehicle is apart

Stop and get a second approval before continuing. Describe what you found, what it now costs, and what happens if it is not done. Send the revised figures rather than saying them aloud, so the yes attaches to a number.

Several states have specific rules about exceeding an authorized amount without permission, and those rules are the reason this is worth doing properly rather than by habit. Check what applies where you work.

The owner is not the person standing in front of you

This comes up with company vehicles, family cars and cars being sold. Record who authorised the work and their relationship to the vehicle, and where the bill is going to somebody else, get the approval from whoever is paying.

Authorization from a driver who is not the owner and not the payer is the version that unravels most easily, so it is worth two extra questions on the booking call.

The customer wants to authorise everything up front to avoid being called

A blanket approval to do whatever is needed sounds convenient and is fragile, because it records agreement to an amount nobody has seen. If you accept one, put a ceiling on it in writing and say what happens when the ceiling is reached.

Some states restrict how open ended an authorization can be, which is another reason to write a number rather than rely on an unlimited yes.

It is an emergency roadside job and there is no time for paperwork

Keep a short version for this case: vehicle, work, price, approval. Two lines and a reply is far better than nothing, and it takes less time than the phone call you would otherwise be having.

Fill in the detail afterwards if you need to, but do not let the price and the scope be the parts that get filled in later.

When it has already gone wrong

Most people find a page like this after the fact rather than before it. This part is for them.

The customer says they never agreed to that amount

Produce the record and let it speak. If the approval attaches to a specific set of figures, this conversation is usually over quickly and without anybody having to be accused of anything.

If the record is vague or missing, work out fast whether the amount is worth the relationship and the public review. Then change the process the same week, because the second occurrence of this is the expensive one.

You went past the authorized figure without asking

Say so directly, explain what was found and why, and be prepared for the possibility that you have to absorb the difference. That is unpleasant and it is much cheaper than defending it.

This is the situation state rules most often speak to specifically, so it is worth knowing in advance what your state expects rather than finding out during the argument.

The job was authorised verbally and now nobody agrees what was said

Write down your account of the conversation immediately, with the date and what was quoted, and send the customer a summary asking them to confirm. Even a late written record is better than two memories, and a reply either way tells you where you stand.

Then make the change that stops it recurring: send the figures in writing before every job, even the small ones, because it is the small ones people stop bothering with.

Questions

What is a repair authorization?

It is the record of what a customer agreed to before work started: which vehicle, what work, what it costs, and who approved it and when. It is created before the job rather than at the end of it, which is what distinguishes it from an invoice with a signature.

Does a repair authorization have to be signed on paper?

That depends on the rules in your state, which is a question worth asking your own repair regulator rather than a web page. In practice many mobile mechanics use a written approval sent back by the customer, because it is easier to obtain and easier to produce afterwards, and because it can be tied to a specific set of figures the customer was looking at.

What should a repair authorization include?

The vehicle and mileage, the customer complaint in their own words, the work to be done, the price split into labour and parts, what happens if additional work is found, warranty terms, what happens to the old parts, and the approval itself with a date. This page describes why each of those tends to be there rather than telling you which are required where you are.

Can I charge for extra work I found during the repair?

Only with further approval, and several states have specific rules about doing work beyond an authorized amount. The practical answer is to stop, send the revised figures, and get a yes attached to those figures before continuing. That is both the safer approach and the one that keeps the customer on your side.

Is a repair authorization the same as an estimate?

They overlap heavily and are frequently the same document. The estimate is the figures, and the authorization is the record that somebody agreed to them. If your estimate is written, itemised and approved before work begins, it is doing the job of both.