Porto, SEF, & A Tale of Two Residency Renewals. It’s a humbling experience to wait in the SEF Immigration office, in Porto, surrounded by dozens of people seeking immigration status for one reason or the other.  There are stories to be told.  Stories of personal choices, such as ours, and stories of trying to gain or maintain work or student visas, or perhaps even desperate stories of life saving pursuits of residency.  It’s humbling to have choices knowing that so many do not.