> For the complete documentation index, see [llms.txt](https://partner-docs.covergenius.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://partner-docs.covergenius.com/rentalcover/endpoints/update.md).

# Update

**What it does:** Modifies an existing booking using a two-step preview-then-commit flow.

**When to call it:** Before the booking's `FromDate` has passed.

{% hint style="info" %}
**Restrictions**

To change the customer's email address, use [UpdateCustomer](/rentalcover/endpoints/update-customer.md).
{% endhint %}

## **What can be updated**

* Rental duration (`ToDate` relative to `FromDate`).
* Cover amount (`VehicleStdLiabilityLow` / `VehicleStdLiabilityHigh`).
* Customer details (`FirstName`, `LastName`, `CustomerAge`, `Address1`/`2`, `City`, `Region`, `PostalCode`, `Phone`).
* Vehicle information (`VehicleNettPrice`).

```
POST /insurances/update/<reference>
```

## Two-step flow

**Step 1. Preview (**`QuoteOnly: 1`**):** Returns the updated price without saving anything. Present the price difference to the customer before proceeding.

```shellscript
curl -i -X POST \
  -H "X_API_KEY: your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "QuoteOnly": 1,
    "FromDate": "2025-08-01 00:00:00",
    "ToDate": "2025-08-10 00:00:00",
    "FirstName": "Jane",
    "LastName": "Smith",
    "Email": "jane@example.com",
    "Country": "US"
  }' \
  https://api-staging.rentalcover.com/insurances/update/AB12-345C-INS
```

**Step 2. Commit (**`QuoteOnly: 0`**):** Applies the change. RentalCover automatically refunds or charges the difference to the original card.

```shellscript
curl -i -X POST \
  -H "X_API_KEY: your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "QuoteOnly": 0,
    "FromDate": "2025-08-01 00:00:00",
    "ToDate": "2025-08-10 00:00:00",
    "FirstName": "Jane",
    "LastName": "Smith",
    "Email": "jane@example.com",
    "Country": "US"
  }' \
  https://api-staging.rentalcover.com/insurances/update/AB12-345C-INS
```

## Request parameters

Update accepts fields from [Group A](https://partner-docs.covergenius.com/rentalcover/endpoints/pages/WVMEVLGGGf8OHDZ9pLSL#group-a.-core-booking), [Group B](https://partner-docs.covergenius.com/rentalcover/endpoints/pages/WVMEVLGGGf8OHDZ9pLSL#group-b.-customer), [Group D](https://partner-docs.covergenius.com/rentalcover/endpoints/pages/WVMEVLGGGf8OHDZ9pLSL#group-d.-pricing-and-coverage), and [Group F](https://partner-docs.covergenius.com/rentalcover/endpoints/pages/WVMEVLGGGf8OHDZ9pLSL#group-f.-partner-and-integration). Include only the fields you want to change, omitted fields remain unchanged.

### Update-specific parameter&#x20;

Required.

<table data-header-hidden="false" data-header-sticky><thead><tr><th>Parameter</th><th>Type</th><th>Description</th></tr></thead><tbody><tr><td><code>QuoteOnly</code></td><td>boolean [0|1]</td><td><code>1</code> = preview (shows new price, saves nothing). <code>0</code> = commit the change. Always call step 1 first.</td></tr></tbody></table>

{% hint style="info" %}
`Email` is accepted as an identifier but cannot be changed here. Use [UpdateCustomer](/rentalcover/endpoints/update-customer.md).
{% endhint %}

## Response

Returns a [Booking Response](/rentalcover/shared-reference/response-objects.md#booking-responses). In preview mode (`QuoteOnly: 1`), Status and pricing fields reflect the proposed change but nothing is saved. In commit mode (`QuoteOnly: 0`), the response confirms the applied change.


---

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