<p>Wow, calm down. It looks like you only need proof if you are trying to test standby. And I doubt they would charge you for a test date change if they’re the ones making you change. I don’t think switching from Sunday to Saturday counts as a test date change, anyway. If you’re so worried, why don’t you just [call</a> them](<a href=“ACT Registration | ACT Testing Dates | The ACT Test”>ACT Registration | ACT Testing Dates | The ACT Test)?</p>