post https://api-stage.bill.com/api/v2/RecordAPPayment.json
Record a bill payment made outside BILL. In the response, a SentPay object is generated for the offline bill payment.
If you are applying bill credits to a bill, the bill amount is (bill amount + bill credit amount).
Note: The vendorId is required when you want to add multiple bills for the same vendor in a single request. You cannot add multiple bills for different vendors in a single request.
