If you are looking for the full Halo Return Policy, click here. 

If you would like to request a Return Merchandise Authorization (RMA) to return your Halo collar, reference this article.

Note:

If you return your Halo Collar, be sure to cancel your Subscription Plan so that you don't continue to get charged. To modify your Subscription, go to the My Account page after logging in at halocollar.com. You can also view this article that explains How to Cancel a Halo Collar Subscription.