At another busy dinner in the Great Hall, Harry stood up, walked over to the head table, and gave the headmaster some parchment. He then snapped his fingers and parchment showed up under every non-pureblood's dinner plate, thanks to the house-elves.
"What is this?" Dumbledore asked.
"The first document is a Letter of Intent. The Board of Governors for Hogwarts posted the annual tuition for this year as 4,350 Galleons. However, it has come to my attention that Purebloods paid about 15% less than they should have and that non-purebloods paid about 15% more to make up for it. Based on the disparity, Gringotts has initiated a class action lawsuit on my behalf against the Board of Governors and Hogwarts school to recover the extra gold the non-purebloods were charged."
"The second document is a summons for you to appear at Gringotts to answer the charge of theft from my trust vault. You personally removed 10,000 galleons from my trust vault for my tuition this year. Previous years are being looked at. Your vault has been frozen by Gringotts till you can justify why you took 5,650 galleons more from me than the posted tuition. I am not receiving any extra education, any further training, or better accommodations than the rest of the students here at Hogwarts."
"But I'm your magical guardian. I'm allowed to take any funds to care for you." was Dumbledore's reply.
"You will have to prove that! You sealed my parent's will so nobody can read it." Harry said out loud.
Harry is taking a stand. Why don't you take one in the form of a Challenge story?