How to get a Bond from a online bank?

[Peter K.]

This is for a security deposit, my state requires that you have it in a physical bank located in our state for holding of the security deposit, if not, you need a bond from that bank you have it deposited - since it is out of state- how do you go about getting a bond from an online bank and how does this "bond" work? Is it basically a promissory note stating that the funds is available?