Currently, Winden is only available to US companies. If you own 25 % or more of a US company, you can apply for a Winden account.
To apply for a Winden account you will need to provide a driver's license or other accepted Government ID for US residents, and a foreign passport for Non-US residents.
If you're applying as a sole-proprietor, you'll need to provide proof of identity using your Social Security Number.
If you're applying as a U.S. C-Corp or LLC, you'll need to provide a federal EIN number, company formation documents, and proof of identity (SSN for US residents and Passport for Non-US residents).