Is there a Repeat Customer Alert, for Newly Placed Order?

Hi- Is there a way to have a new order show whether the customer has ordered previously? I am so embarrassed when my customer tells me theyve ordered in the past and I not know until I search for them. I would love to know if there is a way to quickly tell if this is a new customer or a repeat customer inside the admin order details for every new order. Maybe some kind of alert or maybe something like in this forum when you post you receive a numerical credit under your ID. Is there an add on for this?

Thank You

Almond Joy :-)