This is a useful site:

http://www.chambersandpartners.com/search.aspx?pcd=5

It would be wise to firstly know who had been selected and their retainer/fee structure before even thinking about parting with any money.

An "Escrow Account" should be used for payments conditional that any unused balance is returned, pro rata, to donees.

Following a review of public information, and in the event that areas are found which might merit further investigation, the next round of funding will be considerably more, with no guarantee of any wrongdoing being found.

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Be well