VENDOR CONTRACTS/RECURRING VOUCHER: ENTERING INVOICE NUMBER

Hello,

We are looking into the use of Vendor Contracts and/or Recurring Vouchers.  My first question is can you use recurring vouchers without setting up vendor contracts?

Secondly, if the use of this functionality "automatically" creates vouchers, how do you account for getting the invoice number entered on the voucher?  We have a concern that, without the invoice, there is no way to tie a payment back to the invoice.  If the vendor has a dispute, we are lacking a paper trail.

I appreciate any assistance! Thank you!

Lea