How do I create a payment for an invoice without a vendor ID

We process patient refunds through the cash management system directly: CB554. You still need to add a 'dummy vendor' in AP10 however, it will be the same vendor for all patient refunds. It works well and keeps the patients out of our AP vendor master.

The other method I have seen clients use is to use one-time vendors, which works OK if you are interfacing the refunds into AP.

We interface patient payments through AP520 and use the One Time vendor option. It works well for us.

We use One Vendor number and use a Location Code for each patient. We mass load the Location Code vendors with an Add-In and the AP510.