This will remove any doubt
Not like you would trust him by giving him a no collateral loan 
Whether he signs the message or not, OP can not be trusted.
Just look through this thread and see how he has been trying to take loans from people in the past
It’s okay, if I’ll just be bashed and a punching bag for bored users here then pls close this thread and forget it. Don’t want/need a loan on terms like that
Try a bank, I believe they will give you the loan you want under your terms.Alright