MM-SUS Supplier Invoicing with ECC SES

Hi Guys!

I don't know the ansewer but I think that it is a easy question to understand.

My scenario is the following:

1. Automatic in ECC: PR -> PO -> SES

2. VENDOR: Post the invoice from SUS

It is posible for the vendor post the invoice from SUS without the SES created in SUS?

There is a work arround?

Thanks in advance,

Gax