Guide to communicating invoicing series (ATCUD)

As of January 1, 2023, Portuguese companies are obliged to have a unique document code, known as ATCUD, on their tax-relevant documents.

It is now necessary for the invoicing series to be communicated and validated with the Tax Authority so that the ATCUD for each document can be generated by the certified invoicing software integrated with 3cket.

Each promoter will have to enter the necessary credentials into the 3cket backoffice. This process is done only once and allows the series to be validated automatically when the event is created.

🔗 See more information about ATCUD on the Finance Portal


⚠️ You must follow the steps below and enter the data indicated in the backoffice in order to continue creating events with paid tickets. Free events are not subject to this requirement.


How do I create a new user?

  1. Log in to the Finance Portal.
  2. Search for"User management".
  3. Select the option "Create a new user".
  4. Authorize the WSE - Communication and Series Management by webservice operation.
  5. Submit.

⚠️ For security reasons, the user created must be exclusive to 3cket. 


What data must be entered in the back office?

After creating a new user, theuser number appears on the screen(see example). You need to enter the user + password in the backoffice, following the steps at the bottom of the page.



How and where to enter the data in the back office? 

Data is entered into the platform via the promoter area > manage promoter > invoicing.

After entering and updating, just wait for the green notification that the operation has been successful.



If the operation is successful, the series will be automatically validated when the event is created.