Thailand customisations

I am in Thailand, Revenue Department have difined the rules about the consignment that,when you send the item for consignment to the customer or shopping plaza you must create the Tax Invoice.At the end of the month i need to create credit notes for unsold stock being returned. While the sales and A/R should be recognised only when the actual sales happens.

Client wants to keep track of inventory at customer location. My problem i cannot follow conventional method of shiping and not invoicing since i need to raise credit notes. :frowning:

browsed thru all threads but no answers given to people with same problem.

regards