The "already verified on a different Apple Account" error when that account cannot be identified is a documented situation. Apple's identity verification links to the government ID itself, and deleting an Apple Account does not automatically release that link. The associated account may have been deleted or terminated without the verification link being cleared.
A few things that have helped others in similar cases:
Ask Support to escalate, not close. When a case gets closed with "provide the other account's email," that is a dead end if you genuinely do not have that email. Ask to be escalated to the Developer Program Account Resolution team specifically, and ask them to look up the linked account by government ID, not by email address. They have that capability internally.
Provide device serial numbers. If you have ever set up a device and gone through Apple verification on it, even just signing in with a different Apple ID, that serial can sometimes be used to cross-reference enrollment history. Share serial numbers of older devices with Support.
Reference the closed case explicitly. If case 20000143970410 was closed without a solution, open a new case and cite that number. Ask specifically whether the verification is linked to a terminated or deleted account. If so, there is a separate internal path to release it.
The fix has to come from Apple's side. There is no user-side resolution, but the escalation path does exist.
Topic:
Developer Tools & Services
SubTopic:
Apple Developer Program
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