What's This? This number is the total number of days that you would like to calculate the payoff beyond your "check sent" or funding date. Typically this is any of three choices: 7, 10, or 30, with 30 being the most conservative as well as most expensive.What's This? This area contains a quick copy/paste notation of how the payoff was calculated. It is not required to be used, but can be helpful for auditing purposes to keep a record of how exactly the payoff was calculated.