So, just to get this straight - they contacted you as one of the "FOREIGN BENEFICIARIES", who appear, at some point in the past, to have contributed to Nigerian government funds, and are now being paid out their 'dividend'?
Can I ask what your initial contribution was, and how long ago? - I'm just curious what the 'returns' are on these kind of 'off-shore' investments!!
Or - as this all apears to have come as a massive surprise to you, is it actually the case that you know nothing about this 'investment', so would be claiming the 'profits' by means of a fraudulent misrepresentation - which, I believe, would be illegal?