A more thorough explanation:

haec est finalis concordia

haec est finalis concordia means "this is the final agreement" in Law Latin. It was used in a fictitious judicial proceeding to transfer land ownership.

When someone wanted to transfer land ownership in the past, they would use a legal process called a fine. The process would end with the words "haec est finalis concordia" to indicate that the agreement was final and the land had been transferred. For example, if John wanted to sell his land to Mary, they would go through the fine process and end with "haec est finalis concordia" to show that the land now belonged to Mary.