If you do not have a voided check, you may provide a letter from your bank, confirming the legal entity that has an account and the account and routing numbers for the account.
Why do we require this?
We have very high standards surrounding financial data collection, and set in place these verifications to ensure that everything is done ethically. Additionally, Stripe is required by its regulators to collect certain information from account holders to prevent abuse of the financial system, and this requirement varies from country to country. For US customers, Stripe must review an official document that confirms that the Stripe owner and bank account owner names match, as well as the last 4 digits of the account number.