Hello @Wonly ,

Thanks for posting the question.

Here you payment term date is past of the Invoice date and invoice calculated with that payment date as Invoice date

when validating the invoice, the Due date is Re-calculated from the following parameters:
- invoice_date
- terms_date
- goods_received_date＋RECEIPT_ACCEPTANCE_DAYS
- MIN(rcv_transactions.transaction_date)

Consider the scenario:

If Invoice is not PO matched, then the payment schedule is calculated as the following:

Start Date = the most recent date of the following:

Invoice Date,
Terms Date,
Goods Received Date + Receipt Acceptance Days.

Payment Terms = Invoice Payment Terms.

2) If Invoice is PO matched, then the payment schedule is calculated as the following:

Start Date = the most recent date of the following:

Invoice Date,
Terms Date,
Goods Received Date + Receipt Acceptance Days.

Payment Terms = the most favorable term of the following:

Invoice Payment Terms,
Purchase Order Payment Terms.

Regards,

srinivas