Central Coast Mariners coach Paul Okon confirmed marquee signing Daniel De Silva is eligible to make his club debut on Wednesday night despite fears red tape would delay his registration.

The former Roda JC and Perth Glory attacking midfielder is set to play some part in the Mariners FFA Cup match against Blacktown City at Lily Holmes Stadium, with his international transfer clearance having been approved by Football Federation Australia.

A complicated transfer from his former parent club, AS Roma, to the Mariners was reported as having been held-up by the FFA but Okon says De Silva's registration has come through, deeming him eligible to play make his debut.

"I didn't quite understand what was written and what was said [about De Silva's registration]," Okon said. "Daniel is available for selection."