Action Checks allow you to add custom validations on manager layouts before data is saved to the database. This is useful when a screen has conditional mandatory fields — for example, requiring either a pre-existing location XID or a full set of address fields, but not both.

Example Scenario:

A custom manager layout allows users to enter PO details. The destination can be set by selecting an existing Location XID, or by entering a new address (address line 1, zip code, etc.) using custom attributes. The validation must ensure that at least one of these two options is populated before the record is saved.