Format for letter to tenant, that is behind on rent

[Joel Ray Cotton]

I am wondering if someone has a form letter that I can edit to send to my tenants if they end up being 3 months behind. I would like to start the eviction process or atleast scare them into getting caught up. December is an infamous time for my C class tenants, they do this every year. 

If there are any tips or tricks let me know.