Bolton Wanderers hope to give Tuncay a debut tonight against Carling Cup opponents Macclesfield.
The Turkey striker, 29, needs a work permit and international clearance for his loan from Wolfsburg.
And he was back in Dusseldorf yesterday, waiting for the green light to dash over to Lancashire.
Trotters boss Owen Coyle said: "It has been a difficult week. He's been at the embassy every day.
"It's just legislation. Hopefully we can have him involved against Macclesfield."