Confirmed. As I've been doing the 30 day subscription plan since the start of the game (to hell with saving money, I want the freedom to quit whenever I want even if I never do) SE will always send you an e-mail several days before you're automatically billed, so you can make sure your funds are taken care of, or so you can cancel it in case you quit the game and forgot to cancel your sub. Mighty stand-up thing of them to do.