So, scire facias is a big, fancy term that means "you gotta tell me why." Let's say you borrowed a toy from someone, but then you didn't give it back. The person who lent you the toy might want to get it back, so they would ask the court to use something called a scire facias.
Basically, the court would send you a special letter that says "Hey, you need to give this toy back or tell us why you haven't." That's a scire facias! It's just a way for the court to make you explain why you haven't done something you were supposed to do.
But it's not just for toys – scire facias can be used for all kinds of things! If you owe someone money and haven't paid it back, or if you're not following the rules of a contract, scire facias might be used to make you explain why. It's a serious thing, but it's not too hard to understand!