" The other four houses yielded jewelry, wallets, credit cards, laptops, iPads and Kindles, even a couple of expensive looking vases....

"You didn't do anything stupid like writing IOUs and signing your name, did you?"
"That's an excellent idea," said Danny. He stepped back through the gate, waited for a count of five, and then returned to Eric. Now Eric was standing, and when he saw Danny he visibly sagged with relief. "What kind of moron are you?"
"The fun-loving kind," said Danny. "I'm not an idiot, of course I didn't sign my name to IOUs."
"Good."
"I signed yours. "

― Orson Scott Card , The Lost Gate (Mither Mages, #1)