✔ 最佳答案
It's a scam. I bet you have been asked to transfer the money by Western Union or Moneygram which UK businesses NEVER use, they all have bank accounts. Wiring money using these methods makes the money irretrievable and untraceable. You may as well burn it or send it me!
Do they also have 070 telephone nos? These numbers are premium rate redirectable numbers and can be redirected anywhere in the world. They are used by scammers to give the impression that you are dealing with someone in the UK. In all likelihood you are dealing with a West African. These scams are 409 scams, mostly originating in Nigeria.
There is no such document as an international transfer permit clearance certificate.
See this similar scam asking for $2,000 for the same certificate. You can tell it's a scam from the appalling English alone.
http://www.consumercomplaints.in/complaints/price-money-55m-c252606.html
If anyone offers you a job, a lottery win, an inheritance, money in return for helping move money out of another country into your account etc unsolicited, it is always, always a scam.