To exclude unwanted records from appearing in the letter's merge fields, follow the steps below.

1) Go to Administration > Export definitions > Edit the Revenue Letter export definition used by this Revenue acknowledgement/Revenue letter process.
2) Click on some of the nodes used in the export definition to add or edit a filter.

Note: Many nodes do not have a filter available so the export definition might need to have new fields added to incorporate filters in order to have only the desired information contain in the letter. If new fields are added, the revenue letter will need to be edited to include those merge fields.

The screenshots below show a couple of examples, Acknowledged Revenue\Application Details and Acknowledgee\Revenue, respectively, of filters that can be added to exclude/include records.

Acknowledged Revenue\Application Details:
Acknowledged Revenue\Application Details