Partial Payment posting in AR and clearing of invoice on fifo basis

Question

Dear Gurus,
It is related to partial incoming payment in AR and clearing of invoices on FIFO basis, let me clarify my requiremnt through an Example
Assume there an ivoice of PKR 100,000 in customer Account XYZ
Company received partial PAyment of PKR 50,000 on specific date
Data entry clerk enters payment in F-28 in partial payment tab and assign it to invoice (please note that at present payment is not being assigned and both item invoice and payment remains open without any assignment with each other)
assume next payment which data entry clerk tries to enter with this refernce is PKR 60,000 while reamining amount with this invoice refernce is PKR 50,000 ,system should not allow to enter excess amount with partial paid invoice i.e. user has to be restricted to enter PKR 50,000 against this invoice
As data entry clerk enter partial payment and there is any other open invoice, system should not allow to enter payment till clearance of first open invoice
means specific requirement is
in case of partial payment  with refernce to invoice, at the time of data entry system should chekc that no any other invoice is open in AR ledger
as partial payment document is entered system assign this document to Invoice
if data entry clerk tries to enter acess amount with refernce to invoice, system should not allow means Invoice amount = Payment amount
please advice procedure to meet this requirement
BR
sajida

Answer 1

Hi,
For posting partial Invoice, At the time you received 50000, post it through F-28 only as a partial knockoff against a particular Invoice and at the time you enter second part of the Payment in excess of 50000, the system will not accept as the remaining amount of the Invoice is 50000 only.
For Fifo Invoice Clearing -
At the time of Posting F-28, click on "Distribute by age" the system will automatically clear the value on FIFO Basis.
Regards,
Prashant