Hello guys!

So i am almost done working on an escrow service platform, and i want to add the features of multi-sig to it, basically i want the client to be in control so, the User case is:
1 - Seller or Buyer establish the escrow
2 - Buyer submit funds to platform after both parties checking all information submitted by seller.

The website supports no authentication or registration, so basically it is a bit hard for me to handle multi-sig, do you have guys any suggestions on how to easily make users of the platform use multi-sig? like as simple as a click of a button.
Mostly i will also do it for security purposes as well.