What determines the currency of Separate Charges and Transfers when using on_behalf_of?

The currency of Separate Charges and Transfers when using the on_behalf_of parameter is determined by the country of the Connected Account. This is because Stripe aligns the currency with the country associated with the Connected Account, ensuring that financial transactions adhere to local currency regulations and standards.

When a Connected Account is created, it is typically associated with a specific country, and Stripe sets the default currency for the account based on that country. Thus, even if the Payment Method used supports multiple currencies, the Connected Account's currency prevails when processing Separate Charges and Transfers under the on_behalf_of model.

This ensures consistency in transactions and simplifies compliance for both the platform and the connected accounts, minimizing the risk of currency-related issues during transfers and charges.