Reset of Authorized Signatory contact enables jurisdictional officer to update details and reset GSTIN credentials after verification. Procedure for resetting contact details and access for a GSTIN where the primary Authorized Signatory is deceased or untraceable requires approaching the jurisdictional tax officer with valid business documentation. The officer verifies stakeholder status, uploads supporting proof to the GST Portal, enters the new email and mobile, resets the GSTIN password, and communicates a username and temporary password to the updated email. The applicant must complete a first-time login at the GST Portal and change the username and password upon initial access.