Thanks for posting the request/response bodies with your query.
A facilitator-fee can only be charged to one of the parties involved in a transfer. In the above request, it looks like the charge-to field points to a Customer account in a different application. It’s an example Customer we used in our Docs to demonstrate the API call. You can replace the Customer ID in the url with another Customer ID that belongs to either the sender, or the receiver in the above transfer request.
Please let me know if you have any further questions!