: You can purchase the latest supported versions directly from ABBYY . Note that version 12 is an older release; ABBYY has transitioned newer versions, like FineReader PDF 16, to a subscription-based model.
If you've successfully recovered a key from a previous installation, please let me know where to look! Option 2: The "Buying Legacy Software" Post Abbyy Finereader 12 Professional Serial Key
ABBYY FineReader 12 Professional is legacy software. Since the developer has moved to newer versions, finding a legitimate serial key often means looking for old retail stock or checking your original purchase emails. : You can purchase the latest supported versions