Screw is the third party person that holds the funds from the two parties involves in a transaction. In screw the fund from the two parties for the transaction will be safe without losing it until the transaction done.
It's 'escrow' mate.
See here a good example of what an escrow can do.
www.btc.legal Louis
Stop promoting your service throughout the entire forum, your website isn't even professional and it's just a plain one that doesn't contain any legal matters. And we don't even know if you are the person on that picture.
You've been spamming the forum with that website together with the other one, stop it.