​@ms.shilke What could have happened is that a team member of a Free Plan team of which you are a Team Admin of, wanted to start using a paid version of Miro, so they clicked on the Upgrade button and used their own payment method to upgrade your team. And since you a Team Admin, you received an email notification about this.

However, to know for sure, I will convert your post into a Miro support ticket – the support team can investigate an confirm what happened here.