The Supplement Packet: a collision supplement checklist for the five triggers

The four lines and the five triggers, in the order the video gives them

The Supplement Packet is the same four lines on every supplement you send:

1. Photos of the damage, taken when it was found, with the panel off.
2. The OEM procedure that supports the repair method or the added step.
3. The part number and cost, including the number you ordered if it was the wrong one.
4. The labor time for every added operation.

And there are five triggers that mean a supplement is coming:

1. Hidden damage found at teardown.
2. A part that doesn't fit the car in front of you.
3. A missed calibration the first estimate didn't carry.
4. An OEM procedure found mid-job.
5. A customer add that is outside the approved scope.

Every trigger gets all four lines. A supplement missing any one of them is a conversation the shop has twice, and while it goes back and forth the car holds a bay and the rental keeps running. Enterprise's own report puts the overall length of rental for collision-related rentals at 15.1 days in Q2 2026, so a slow supplement is adding days to a number that is already long.

Who this checklist is for

It's for the estimator, the production manager or the owner of a collision shop, whether that's one location or a few, who wants supplements to go out complete the first time. You don't need new software to use it. You need the repair plan, a phone camera, access to the OEM repair information you already pay for, and one person who owns the supplement for each car.

Supplements aren't a sign that someone wrote a bad estimate. The estimate is written before the car is opened. At a CIC panel covered by Repairer Driven News, an insurance representative said nearly every auto insurance claim now has at least one supplement, and the same panel pointed at better photos and documented justification as the best practice. The goal is not fewer supplements. It's supplements that don't come back.

What you need before you start

• The approved estimate for the car, so you can compare it line by line with the repair plan.
• The OEM repair information and position statements for the make. Honda, for example, calls for a preliminary scan during estimating and a post-repair scan to confirm no codes remain, and says some driver-assist systems need inspection, calibration or aiming after body repair.
• A named owner per car. One person decides that a supplement is warranted and signs it.
• A same-day rule. The packet goes out the day the trigger is found, not at the end of the week.

The checklist for each trigger

Copy this table. Each row is a trigger, and each column is what that trigger's packet must hold.

Trigger	Photos	OEM procedure	Part number and cost	Labor time
Hidden damage	Panel off, the damage in context and close up	The procedure or measurement that supports the repair method	Any added parts	The added operation
Part doesn't fit	The mismatch, side by side with the car	Only if the fit changes the method	Ordered number, needed number, cost difference	Any extra time to remove and refit
Missed calibration	The sensor, camera or radar near the repair	The OEM requirement for the calibration	Sublet cost	Time for the scan and setup
OEM procedure found mid-job	The area the step applies to	The page or position statement that requires it	Materials the step adds	The step's time
Customer add	The added damage	Not usually needed	The cost, and who pays it	The added time

1. Hidden damage

This is the trigger most people picture: a rail, an apron, a reinforcement or corrosion behind the panel the estimate was written against. Shoot it the day it's found, with the panel off, from far enough away to show where it is and close enough to show what it is. Add the procedure or measurement that supports the repair method and the labor time for each added operation. If the teardown happens days after intake, that gap is already eating rental days, so it's worth asking why.

2. A part that doesn't fit

The part number was right on paper and wrong on the car: a different trim, a bracket that doesn't line up, a connector that doesn't match. Photograph the part next to the spot it was meant for, and write the part number you ordered next to the one the car actually needs. Include the cost difference when the correct part costs more.

3. A missed calibration

This is the trigger that keeps growing. CCC's Crash Course 2026 found calibrations on 28.3% of all repairable appraisals in 2025, up from 21.8%. On DRP work, CCC's earlier report found that 56.5% of Q1 2025 DRP calibrations appeared on a supplement, so more than half of them weren't on the first estimate. For this packet, list the equipment the car carries near the repair, attach the OEM requirement, and add the sublet cost and the time.

4. An OEM procedure found mid-job

The manufacturer requires a step the estimate didn't carry, such as a sectioning procedure instead of a replacement, corrosion protection after a weld, or a scan after the repair. Honda's position statement on scans was updated in 2025 so that its diagnostic section now reads as requirements rather than recommendations. Attach the exact page that requires the step. A supplement that says "per OEM" without the page is one the appraiser has to go and find.

5. A customer add

The owner sees the car apart and asks you to fix the dent on the next panel too. That's fine, but it's outside the approved scope. Photograph the added damage, get the customer's okay in writing, and note whether it's charged to the customer or the claim before anyone touches it.

Step by step, the day a trigger is found

1. The tech flags it on the repair order or the job board, with one photo, and keeps working on anything that isn't blocked.
2. The owner of the car picks the trigger from the five above.
3. Fill the four lines using that trigger's row in the table. Leave nothing blank. If a line truly doesn't apply, write "not applicable" so the reader knows you checked.
4. Check it against the approved sheet for anything else the repair plan now needs, especially a calibration.
5. Send it the same day and note the time it went out.
6. Track its age. Anything with no answer by the next business day gets a follow-up from the person who sent it.
7. Log the outcome: approved as sent, approved after changes, or a line disputed and why.

A worked example (demo shop)

Here's how it might look at Redline Auto, a made-up shop used only for illustration. A crossover comes in for a rear quarter hit. At teardown on day two, the tech finds corrosion on the rear rail behind the bumper. The estimator picks "hidden damage", takes four photos with the bumper off, attaches the OEM sectioning procedure, lists the added rail part and its cost, and adds the labor time for the section and the corrosion protection. While checking the repair plan, the estimator also sees a rear radar sensor near the repair, so the packet adds the calibration requirement and the sublet cost. It goes out before the end of the day.

The point of the demo is the timing, not a result. Every detail in this example is made up.

What to keep with a person

Automation can assemble the packet, flag a missing line, notice a calibration the estimate didn't carry and track how old each supplement is. A person keeps:

• The decision that a supplement is warranted and what it should contain.
• The appraiser conversation and any negotiation over a disputed line.
• The sign-off. A person's name goes on the supplement, and that person answers for it.

What to watch out for

• Photos taken after the fact. A picture taken after reassembly can't show what the teardown found.
• "Per OEM" with no page. Attach the document every time.
• Packets held for a batch. The same-day rule only works if nobody saves supplements for Friday.
• Calibrations found at reassembly. Check for sensors near the repair when the trigger is logged, not when the car is almost done.
• Customer adds without writing. A verbal yes turns into a dispute at pickup.

How to tell it worked

After a month, put last month's supplements and this month's side by side:

• Fewer supplements came back asking for a photo, a page or a labor time.
• For most cars, the packet went out the same day the trigger was found.
• Calibrations show up in the packet with the hidden damage, not as a second supplement days later.
• Your production manager can say which cars are waiting on a supplement, and for how long, without asking around.

If you want that last view without a spreadsheet, the RevvOS daily operations view and operational visibility pages show how waiting work lands on one short list for a person to decide, and you can see a demo with your own shop's data.