If you only need to recover a small amount of data, you may not need an activation code at all. EaseUS Free Edition allows you to recover up to How it works:

Older versions like 12.8.0 sometimes require "Offline Activation" if the computer isn't connected to the internet.

involves choosing between using a genuine license or exploring free alternatives. Version 12.8.0 was released in early 2019 and has since been succeeded by much newer versions like 18.x and 20.x. Option 1: Activating with an Official License (Recommended)

Getting a detailed guide for activating EaseUS Data Recovery Wizard 12.8.0