Accounts Payable in Russia

We are working with a Russian client using JDE 9.0 for property management. The client is stating they have requirements to create "prepayments". For these prepayments, the following accounting transactions should occur in the following order:

1. DEBIT to "prepayment" liability account and CREDIT to cash.

2. After documents (Act of Acceptance / Invoice) are received from the supplier, the TRADE liability and GL expense can be recognized. (Essentially, this would be what is entered in a voucher).

3. VAT needs to be recognized for the payment after step 2 above.

It seems the requirement is to have the payment batch (K) created BEFORE the voucher batch (V). Since this is completely backwards to standard JDE AP processing, please reply if anyone has experience using accounts payable, specifically with prepayments, in Russia.