For regular Invoice documents, you can restrict what parts of a document are searched by the Vendor search and the Employee search for Invoice Processing.

This is done by editing the database used for these searches in the Settings > Invoice Processing > Global Settings > ASE Database Settings.

For example, you can restrict the search to the first page or a specific region.

For the InvoicesCN class however, there are no Invoice Processing settings that you can use to restrict the database searches to a specific page or region. Because of this, if you want to restrict the search area, you can edit the corresponding database locator in the Transformation Designer. For more information on configuring regions for database locators, see the Transformation Designer Help.