Field help (CODNUMEND3) 

This field can only be viewed if the following conditions are met:

You can indicate here a final sequence number, it must be different from the main sequence number.
This sequence number is used only if the parameter entitled PORDKS - Digital Signature Portugal (chapter LOC, group POR) is set to: Yes for the company of the stock change. It is used,upon signing the return, to assign a new number to the document when it is subject to the electronic signature and SAFT-PT (Standard Audit File - Tax) payment processes.The former number is no longer displayed but it is still recorded in a specific field.

When the counter is used for the Portuguese legislation, the sequential number is applied to the document when it is subject to the electronic signature and SAFT-PT (Standard Audit File - Tax) payment processes. The parameter entitled PORDKS-Electronic signature Portugal(LOC chapter, POR group) must be set to: Yes, and the DKS-Electronic signature must be active.
The counter must have the following structure:

Between the first and the penultimate component, the complement can be used as an option. Although, the complement is mandatory for purchase auto-invoices. If the structure is not properly defined, a blocking error will occur once the document is validated or signed.