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Click I don't know my previous information to upload an identification document to verify your identity in order to update your account details.
Not all payout accounts require verification before editing. Bank accounts require verification after the first payout. Debit cards always require verification.
In the Express dashboard navigate to Profile icon > Payout Details > Payout Account. You may be asked for verification at this point.
If you don't have your previous bank account or debit card information available, click I don't know my previous information.
This takes take you to a page to upload an identification document (for example driver's licence or passport) to verify your identity. Once verified, you can update your account details.