Hello, there.
My doubt is pretty much what the title says: since I sell single trading cards, some customers tend to keep creating one order after the other for these cards, asking me to put these items all together with their first order, and there's nothing more timewasting and annoying than that, since I have to suspend many of my other activities to keep modifying their requests.
Enough said. What I'm looking for, plain and simply: Is there a mod or another way to deny a customer the option to fill a new chart and buy more if that customer still has an open order awaiting payment?
Thank in advance for any help.

