Written agreement for Off Market Deals

While there is a lot of content regarding the structuring of creative financing deals, I haven’t come across many specific examples of what the paperwork is supposed to look like to get these deals to the finish line. I feel like I understand enough about seller financing, Sub To, etc. to actively start seeking out leads but I am hesitant to do so because I feel as though, I will be unprepared to execute a deal after receiving verbal buy-in.

Can anyone help with this? Where can I find specific examples? Is documentation still managed through traditional institutions like escrow, or perhaps a real estate attorney? Or, are there other means to achieve the goal of closing a deal in this manner?

Please let me know! Any assistance in this regard would be greatly appreciated!!!