In these fanfictions, a frequently seen theme is dealing with dark magic related legal issues. For example, if a Potter family member is wrongly accused of using dark magic, the family lawyers have to prove their innocence. Also, there are themes about family secrets and how the lawyers help keep them or uncover them when necessary. Family relationships are also explored, like how the lawyers interact with different generations of the Potter family, whether it's the young Harry or his descendants. It's really interesting to see how these themes play out in the magical context of the Harry Potter universe.
Common themes include magical contracts. Since the wizarding world has a complex system of magical contracts, family lawyers in these fanfictions often have to deal with issues related to them, such as making sure contracts are fair to the Potter family. Another theme is the integration of Muggle and wizarding law concepts. Sometimes, the Potter family has to deal with situations that involve both Muggle and wizarding laws, and the family lawyers have to navigate through this. And of course, there's always the theme of justice within the family, making sure that each family member is treated fairly according to the law, whether it's about property rights or personal rights.
One common theme is the protection of the Potter family's name and legacy. Family lawyers often have to fight against those who try to slander or take advantage of the family. Another theme is inheritance disputes, as the Potter family has a lot of wealth and magical artifacts.