Umbridge looked at the note. Then frowned. Then read it again.
What ever did he mean? Strange man. Then she read it again and it dawned on her. A joke!
Laughing, she wondered if she should write back telling him how refreshingly amusing his joke was. She decided she had more important matters to attend to, however, as several of her pureblood benefactors seemed to have a lot of Muggle businesses.
It was a most unfortunate side effect of the decree. She hadn't thought it would effect anyone other than the mudbloods and halfbloods.
Still laughing at the joke, she set out to write a simple permission form for the office girls to copy and send to those purebloods who supported her. Naturally they wouldn't need to ask her permission every time they did business. She smiled, and decided that that would be a good way to decide permissions.
If they were pureblood or otherwise powerful, they got a yes. If they were halfbloods and mudbloods, they got a no. That ought to save her trouble.