I became illegal in Portugal and returned to Brazil. Can I go back?

Staying in Portugal illegally does not automatically trigger a travel ban, but records of a 'duty to depart' may now be logged in the Schengen Information System (SIS) under recent legal changes. If you left voluntarily without receiving a formal notification, exclusion order, or signing any documents, you may not have an entry ban, though individual cases vary and could still have digital records in the system.