FIFA has signed off on Portuguese goalkeeper Mika moving from Boavista to Sunderland after technical woes hindered the deadline day switch.
Sunderland have completed the signing of Mika after the goalkeeper's move from Boavista was delayed by a "technical issue" at the Portuguese club's end.
The 25-year-old has signed a two-year contract at the Stadium of Light and is David Moyes' 10th signing since succeeding Sam Allardyce as manager.
In a statement on their official website, Sunderland explained FIFA had ratified the move for Mika, a former Portugal Under-20 and Under-21 international, because "both teams fulfilled their commitments" prior to the August 31 deadline eight days ago.