Short answer: nobody can plan this for you in advance except you. There is currently no "next of kin" or estate-access process built into UIID, and the architecture makes that a deliberate trade-off rather than an oversight.
Why it is different from a bank or a social network: A traditional provider can verify a death certificate and hand an account to an heir because the provider holds the credential. UIID does not. Your Core ID is device-based and biometric-secured, and even the encrypted UIID Cloud backup restores your identity to a device that can pass your own recovery routes — not to a relative who is not you.
What this means in practice: If nobody in your family has your backup codes, an exported .uiid file, or access to a device already enrolled to your identity, your identity cannot be recovered by anyone after you are gone — including us. Assets, badges, agent permissions, and any organization you administer stay locked to a credential nobody can present.
What you can do today: Treat your UIID like you would treat a will. Store backup codes and an exported .uiid file where your estate documents live, or share them with someone you trust, using the same discipline you would use for a password manager's master password. If you administer an Organization UIID, make sure at least one other person in the organization also has recovery access — see "How should an organization manage UIID recovery securely?"
What we cannot offer today: A formal legal-heir verification process that reissues access to a deceased person's identity. If you believe this matters for your situation, write to [email protected] — this is exactly that would justify building one.