Commission is when you invoice an agent “gross” and the agent pays you the “gross” value. the Commission is then reserved for payment at a later date.

and

Discount is when you invoice an agent “net” of his discount and he pays you the “net value keeping the “discount” for themselves.

There is a helpsheet (no.SQL009) which covers this.  Please click on the following link to view or download helpsheet – HS009 Agent – Difference between Discount & Commission.docx or please watch the video below demonstrating this process.