First things first, you should double-check your Policy Wording to make sure that you can make a claim for the reason you need to. With your policy documents you’ll be given the claims details, which will tell you who to contact and what to do. There might be a time limit to when you can claim (eg. 30 days), so get your claim submitted as soon as possible.
The claims handlers of your pet insurance policy will then let you know if your claim has been successful, and keep you up-to-date with the process. Sometimes, insurers have a limit on how long after treatment they can pay your claim - so get started with your claim as soon as you can.