The payment voucher can be made to (Business Partners) vendors or customers. We have three mode of payment such as cash, cheque and wire transfers. While making payment to business partners, we can map with purchase invoices or sales return vouchers. The multi currency also can be used to pay the value, the currency exchange value will be fetched from online.
The all unmapped purchase vouchers and other vouchers will enable once you click on Map with Invoices button at right bottom corner.