Which document verifies the number of personnel served for essential station messing (ESM)?

The correct document that verifies the number of personnel served for essential station messing (ESM) is AF Form 79. This form serves as a record that helps in managing and documenting the food service operations, specifically in tracking the number of personnel who are provided meals. It plays a crucial role in ensuring that all operational and financial aspects of food service management are accurately maintained.

The other forms listed have different purposes: AF Form 1119A is used for food service management applications but does not specifically verify the personnel served. DD Form 1131 is related to the identification and processing of funds but is not used for tracking meal service numbers. IMT 3516 deals with a different aspect of operations and does not pertain to ESM verification. Understanding the specific uses of these forms is essential for efficient management of food services within military operations.