If you've applied for a sit that you're no longer able to attend, you can withdraw your application at any time provided you are not confirmed for the sit already. You can withdraw your application by following these steps on the website: 

1. Go to your Inbox and open your conversation with the pet parent you've applied to sit for 
2. Click on the tick icon next to the dates that you with to no longer apply for 
3. A message with pop asking if you're sure you wish to cancel your application, click the 'confirm' button

Those steps will withdraw your application instantly and notify the pet parent.

We would always advise that if you're withdrawing your application that you send a courtesy message to explain why you're no longer applying.