What form do I use for a Seller Finance offer

[Bryan Sandera]

Hello,

I want to offer my neighbor to buy his house using seller financing.  The needs a lot of work!  I plan to offer 12 months financing with a balloon payment after 12 months when I obtain a conventional mortgage loan.  What real estate form is best used for this in Grand Rapids?  I also plan to use a title company.  Do I ask them?  Thanks for your input!!