"Very well," Antonin said quietly, and cast the spell to pull the remaining dark magic out of Fleur and into himself. She probably didn't even notice that, he said to himself.
Then, with several elaborate passes of his wand, he activated the certificates and spoke, "By the authority vested in me, I pronounce you clean of any dark taint, and so certify." There was a flare of violet magical energy under Antonin's hand on Fleur's shoulder, and beneath both of her hands on the certificates.