Love the idea, but I don't really get the recipient field - whichever (valid) address I put in, I get an error. I also think it's a bit unclear on what should b

Love the idea, but I don't really get the recipient field - whichever (valid) address I put in, I get an error. I also think it's a bit unclear on what should be entered here, a post/zip code, company name, etc.?