You cannot transfer a license without the original owner doing it for you on the Sophos website, nevermind if the original owner is no longer alive, in business, or donated/sold the equipment to the seller your buying from.
This is apparently Sophos wanting you to use their "trusted" resellers and partners just to make sure they can make money off the same device again. Ironically I cannot help but wonder how "trusted" their hardware from a Chinese factory is with the latest supermicro chip saga.
Usually when a company has a slogan we say the opposite is true and in this case it's no lie "security made easy". Silly rules and the rigid companies making them up have no place in today's economy.
Thank you for your email.
The item was registered under a different user (probably the previous registrant) thus, you are unable to access it.
We highly recommend purchasing via our trusted resellers and partners. In addition, you can get in touch with the previous owner or their account representative to request transferring the owner of the license.
Let me know how it went.
Prince Keemer Aroma
Sophos Customer Care
Support Knowledge Base: https://community.sophos.com/
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SOPHOS - Security made simple