I have already showed item sale process posting here in Posting Group #2 post. But, we can have some specific variants of this posting. One of them is when we use Payment Method.
If you choose Payment Method code on sales document header, and this Payment Method has configured Bal. Account Type and Bal. Account No., NAV will automatically create the balancing journal line. This functionality is great when we are being paid in full at the time of sale, but we can use this feature in some other specific process.
You can see how system works with Payment Method on following flow-chart:
When we finish with this Sales Order posting, we can find following G/L entries navigated to Posted Sales Invoice. You can see standard G/L entries about invoice and the last two of them, connected with Payment:
Totovic Dynamics 365 Blog 
[…] 4) Item Sale Posting with Payment Method […]
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Remark: You can find a small fault on my flowchart. I wrote “Purchase Header” and “Purchase Line” instead “Sales Header” and “Sales Line”, by mistake. Sorry for the inconvenience, I will correct this soon.
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Flowchart corrected. Thanks to Mirko Draskovic.
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