Malachi 3:10 0 Bring the whole tithe into the storehouse, that there may be food in my house. Test me in this," says the LORD Almighty, "and see if I will not throw open the floodgates of heaven and pour out so much blessing that you will not have room enough for it.
So I say just tell them to send it all to your church, donate the whole $25M anonymously and give them the address of the church. (Of course letting the church know it's a scam and not to give any personal information to the scammers.)
Let's look at more scripture:
Obadiah 1:17 17 But on Mount Zion will be deliverance; it will be holy, and the house of Jacob will possess its inheritance.
Well, I don't think I'm of the house of Jacob. I'm not even Jewish, so maybe it should go to your local temple.
Either way, it's not my money, so they should send it elsewhere

TB