I noticed that you said PayPal doesn't support sending the billing or shipping address to PayPal using Advanced Payments. Therefore we can't use any of PayPals tools for shipping or contacting our customers. This will require us to build a complete backend to handle all the admin details. The costs of implementing this are astronomical to our clients. They have already integrated PayPal into their workflow.
I contacted PayPal Merchant Technical Support on two occasions over the last few days to clarify whether it is possible to send this info to PayPal and on both calls to different support people they say this is entirely possible with Payments Advanced and that it is in the documentation.
How can I get this accomplished?
Thanks for your help,