If you are using a trial, your "verified" key is usually sent immediately upon sign-up. Step-by-Step Activation Guide

To ensure your security, always prioritize official channels. "Verified" keys from unofficial PDF lists or forums often expire or are blocked by Avast.

After the first year, you may be prompted to "activate" again. You can do this within the app by navigating to Menu > My Subscriptions and selecting the free version again.