What is a product key? After you purchase a recording, you will receive a product key. A product key identifies you as the rightful owner of one license of a test recording. For many products, it enables you to a return your original product for a free replacement if your product becomes defective within six months of your purchase and grants you free emailed replacements of pdf files included with your purchase. (Some exclusions apply.) You will also be notified of any recalls or updates. To register your product key today, complete the below form.