To document the facts means to record or write down the exact information or details about something that is true or happened, so that it can be easily referred to or proven later. Full definition
However, in order to help your cause and your case, it is important to remember to document the facts of your traffic stop and the circumstances surrounding it. (stankolaw.com)
That's a well studied, well documented fact, yet rewards are used so often to motivate behavior change that you'd never know it. (rocksolidnutritionandwellness.com)
A formal resignation letter documents the fact for your company's human resources department that you're leaving. (thebalance.com)