West Brom spent 12.5 million euros to acquire the striker from Dinamo Kiev but he has not received his work permit and says he is unlikely to face Sunderland on August.
The Nigeria international joined Albion from Dynamo Kiev last month for a fee believed to be in the region of 12.5 million euros, but he has not yet been able to join up with his new teammates for preseason.
Ideye has been stuck in his homeland as he awaits clearance for the relevant documents, though he is hopeful that he will be given the green light to travel in the near future.
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"Officials at the British High Commission in Nigeria are still working on it," he told BBC Sport. "The club has fulfilled all the necessary requirements, but I have been told that the British High Commission require up to 15 days to sort this, which is preventing my ability to travel.
"The public holiday in Nigeria last week [Eid holiday] slowed things down a little bit on this side. I hope to get it sorted in the next couple of days because I can't wait to join my new teammates in England."
Ideye does not expect to feature in Albion's Premier League opener against Sunderland on Aug. 16 after missing out on preseason.
"I need to join the team first, then train with the squad in front of the manager and so far I have not been able to do that." he added. "It all depends on how quickly the paperwork can be done, but realistically it will be difficult to target the first league game of the season for my debut."