# Cancellation email
**Add a transparent pixel to your cancellation email so your Flip.to platform can detect when any guest cancels their stay.**
A cancellation pixel can be added to your cancellation email template, which allows Flip.to to find the appropriate reservation, flag it as cancelled, and avoid sending any additional emails to the guest beyond that point.
{% hint style="info" %}
When the email is opened by the user, the pixel is loaded and signals your platform to update your records accordingly.
{% endhint %}
## Pixel snippet
The basic structure of the snippet to be added is:
```html
```
### Parameters
Below are the URL parameters that should be appended to the image source URL. All values should be properly URL encoded.
| Name | Value | Description |
| ----------- | ------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| companyCode | Your Flip.to company
code
| Please check with your [Customer Success Manager](/docs/support/customer-success.md) if needed and replace `XX` with your own companyCode. |
| code | The property code used by your booking engine | Replace `YY` with your own property booking engine code. |
| crsnumber | The reservation CRS number,
if available
| |
| pmsnumber | The reservation PMS number, if available. | |
| email | Guest's email address | |
| startDate | Guest’s check-in date | Dates should be formatted as yyyy-M-d
For example: 2028-5-15 or 2028-05-15
|
| endDate | Guest’s check-out date | Dates should be formatted as yyyy-M-d
For example: 2028-5-15 or 2028-05-15
|
| dateFormat | Optional
Specifies a different date format for the startDate and endDate parameters.
| y default dates should be specified as yyyy-M-d. However, you can change the default format by entering the appropriate format here.
For example, if dates are entered as 12/31/2028 the date format to be specified is M/d/yyyy.
|
{% code title="Sample" %}
```html
```
{% endcode %}
---
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