Phantom New Coupon

Hi, I was just wondering if anybody else has had any emails for what I would describe as a phantom new coupon?

I have a coupon site that’s rarely used. Last night I had the automated email I had setup to be sent if any user submitted a coupon. However, after logging into my website there was no new coupon, no new orders in the order manager and even no new users.

I’ve never had this happen before, just wondered if anybody has? I don’t think it’s worth raising a support ticket just yet unless it starts happening more.