The moment you enter a number of a customs document, we automatically check whether its structure corresponds to that in the various customs systems.
In this way, we reduce the chance of error for you and problems are avoided when collecting the container at a terminal.
A straightforward example: an MRN number always comprises 18 characters. If you enter an MRN number with 17 characters, you will receive an error message. There are different criteria for each type of customs document that are automatically verified for you by the Port Community System.
Also see: # which document type should I use in which situation