Just something that popped into my head. Harry gets a mysterious contact.

Who is it?

Harry was enjoying some quiet time with his godfather, Sirius Black, when he heard shouts down in the kitchen. Alerted, the two ran downstairs to see what was wrong. The sight was... confusing. Moody was holding a letter that had HIS name on it and performing some spells, probably counter jinxes. He soon slowly opened the letter with an eager Fred and George watching while other order members, including Sirius, had their wands out, trained on the letter. Not even withdrawing the content, he glanced at Harry then slowly handed it over. Harry hesitently took it and glanced at the open envelope.

On the top read 'You are in number twelve Grimauld Place in Borough of Islington, London. I have a squad half a mile out ready to bomb the place. Give the boy the letter now.' Harry shared a glance with Sirius who read the letter over his shoulder: Who sent this? Withdrawing the contents of the envelope, Harry scanned to see if he could find out. It read 'Harry J Potter, muggles aren't as ignorant as you might think. We would like to take you in for a debriefing on the events that took place in Little Hangleton two months ago. By the time you finish reading this letter I will be waiting for you outside.' Sure enough, when Harry looked out the convienient window, someone was there.