1

From the sub-module, right click on a row item to display the contextual menu

Select "PAY.in . Payment from customer", then "Generate the document"

2

The PAY.in sub-module is highlighted to show that it is holding changes waiting to be validated:

Click on it.

Important: You can repeat the same procedure from step 1 with other row items to be added to the same PAY.in

3

Review the preset fields value and enter the missing data, then

validate