Welcome to Just Answers! Thank you for giving me the opportunity to assist you! I will do my best to help!
I still believe that this is an effort to separate you from your hard-earned money! No one can obligate you to pay taxes without your written consent. A verbal contract is not binding. Additionally, I have done some more research on this. The Economic Community of West African States does not levy taxes. The countries that comprise the ECWAS each levy their own taxes, very similar to the EU. So there would be no "ECWAS" level inheritance taxes.
I have furthermore found several references to frauds and scams using ECWAS fees as the reason to get money out of unsuspecting people. Fraudwatchers, Hotscams, Fakeletters.org, and numerous other sites show this kind of scam. Just Google "Economic Community of West African State Scams" and look at the dozens of frauds that are out there, all purporting to give the "beneficiary" huge amounts of cash, with only a small payment as tax or fee.
I am sorry, I wish I had a better answer! Unfortunately, because of the lack of prosecution in the ECWAS for these types of schemes, they are abundant! Please, keep your money and don't give it to anyone, even if you have come to "know" them through correspondence and/or phone conversations over the past few months.
I hope this helps you! If you have any more questions, please let me know. I will be happy to help you with these!
Thanks again, and have a great holiday weekend!