How to add a vehicle to a commercial auto policy
A client emails: "We bought a new van, please add it to the policy." Four seconds to read, and not enough to act on. An endorsement request that reaches the carrier with a missing VIN or an unclear date often comes back, and the days it spends bouncing are days the vehicle may be driving without the coverage the client believes it has.
This guide covers adding a vehicle to an existing commercial auto policy in the middle of the term: what to collect, how to write the request, and where requests go wrong. Carrier portals and forms differ, so treat this as a checklist of what nearly every carrier will ask for, and check the carrier's own requirements for the rest.
What you need before you write to the carrier
Collect these from the client first. Most of them are one line each in a good change email.
- The effective date. The day the client wants the vehicle covered. It is often the item that is missing. "Next week" is not a date: turn it into a calendar date and confirm it back to the client.
- The VIN. Seventeen characters. Take it from the title, registration or the bill of sale, not from memory. The guide on how to check a VIN before you send an endorsement explains the check digit that catches many typos.
- Year, make and model. Copy these as the client wrote them, then compare them with what the VIN decodes to. If they disagree, one of the two is wrong.
- Where the vehicle is kept. The garaging address, as a full street address with the suite or unit number if there is one. Carriers rate commercial auto partly on where a vehicle is kept, so a vague "at the shop" is not enough.
- How it is used. Delivery, service calls, hauling, personal use by an employee. Use is part of how the vehicle is classified and rated, and the client's description is the source.
- Whether it is financed or leased. If so, the lender or lessor may need to be listed on the policy. Ask for the exact name and mailing address as they appear on the loan or lease paperwork, which usually also says how the lender or lessor wants to be named. Follow that and the carrier's rules.
- Whether it replaces a vehicle. If the new vehicle takes the place of one already scheduled, say which one, by VIN, and the date the old one leaves the policy. Otherwise the policy ends up with both.
The first four are what nearly every carrier needs before it can act. The rest can change the premium or the paperwork, so collect them now rather than in a second round of emails.
Check the request against the policy
Before you write a word to the carrier, put the client's email next to the declarations page or the current vehicle schedule. Three checks take a minute and catch the quiet errors.
- Duplicate VIN. Is the vehicle already on the schedule? Clients sometimes ask to add something that was added at renewal.
- Garaging address. Is the address already a location on the policy? If it is not, you may be adding a location as well as a vehicle, and the carrier will want to know that.
- Replacement versus addition. If the client says "we sold the old truck," find that truck on the schedule and note its VIN.
Write down anything that does not fit. A mismatch is a question for the client, not something to resolve by guessing.
Write the request
Carriers read these quickly, so make the request easy to act on. A plain structure works with any carrier.
- Subject line: the insured's name, the policy number, and the word endorsement or change request.
- First line: the action in one sentence. "Please add the vehicle below to policy number ... effective [date]."
- The vehicle block: year, make, model, VIN, garaging address, use, and the lienholder if there is one.
- Anything that is not known: state it as missing rather than leaving it out. "Lienholder: confirming with client." The carrier can then see what is outstanding.
- A closing question, if needed: for example whether the carrier needs a signed form for this change.
Keep one change to one request where you can. If the client also wants to add a location or drop a vehicle, say so as a separate item with its own effective date, not as a clause buried in a paragraph.
What the carrier sends back
Expect an endorsement or a confirmation showing the premium change, and possibly a request for something you left out. When it arrives, compare it with what you asked for: the date, the VIN, the vehicle details and the lienholder. Errors that come back from the carrier are cheaper to fix the same day than at renewal. Whether coverage began on the date the client asked for depends on the carrier's confirmation and the policy, not on the email you sent, so do not tell the client it is covered until you have that confirmation.
Common mistakes
| Mistake | What goes wrong | Fix |
|---|---|---|
| No effective date in the email | The request comes back, or is processed on a date nobody chose | Ask the client for a calendar date |
| One digit wrong in the VIN | The vehicle on the policy is not the vehicle in the driveway | Check the VIN's check digit before sending |
| Vague garaging address | The vehicle is rated at the wrong place, or at a location the policy does not list | Get the full street address from the client |
| Replacement not mentioned | Both vehicles stay on the policy and the client pays for both | Name the vehicle that leaves and its date |
| Lienholder name guessed | Wrong party on the policy | Copy it from the loan paperwork |
How EndorseDesk does this step
EndorseDesk drafts the request from the client's change email. You upload the email (as a text, PDF or Word file, or paste it) and, if you have it, the declarations page. It reads the email into a fixed set of fields for a vehicle change, gives every value the line of the email it came from, and produces a portal field sheet and a carrier email you can copy.
Ordinary code then checks the values: the VIN's length, letters and check digit, that the effective date is a real date, that the required fields are there, whether the VIN is already on the declarations page, and whether the garaging address is a location the declarations page lists. A value the email does not state is listed as missing, not filled in. When the email gives a day and month but no year, the year is taken from the policy period on the declarations page only when that period leaves no doubt; otherwise the date is marked to confirm. A change the email gives "the same date" as another takes that change's date when there is only one it can mean. A VIN that fails its check is shown as written, never corrected. A second, stronger AI model reviews every result and lists what is left for you to decide; the drafting model corrects the serious problems the review finds, and code checks every correction. Results are not verified by a person.
EndorseDesk sends nothing to the carrier and writes to no other system: you check the result and send the request yourself. One change request, an email with up to 6 changes and its declarations page, is 6 credits. You can sign up and try it.
Questions
- Can I add a vehicle after the client has already started driving it?
- It depends on the policy and the carrier. Some commercial auto policies cover a newly acquired vehicle automatically for a limited time, depending on the coverage form and the covered auto symbols, and carriers differ on back-dating. Never promise a past effective date yourself: read the policy, ask the carrier and write down the answer.
- Do I need the declarations page to add a vehicle?
- You need it to avoid mistakes, not because the carrier asks for it. It shows the vehicles and locations already scheduled, so you can spot a duplicate VIN or a garaging address the policy has never listed.
- What if the client's email gives only a make and model?
- Do not send the request yet. Most carriers will not process a vehicle addition without a VIN and an effective date. Reply to the client with the short list of what is missing and wait for the answers.
Send the request, not the retyping.
Sign in, upload the client's email and the declarations page, download the field sheet and the carrier email.