When running a business, there is no such thing as too much information. If you are working with blanket agreements, being able to see the blanket agreement reference in different contexts is highly valuable. You can create reference to blanket agreement in incoming and outgoing payments:
Blanket agreement is also available as selection criteria in payment wizard and aging reports:
In addition you can add it as a column in Open Items List report and internal reconciliation window, and even generate a relationship map for it.