If you’ve been sitting on a pile of 
Undercoins and wondering when you could finally move them between your alts again, Blizzard just delivered that feature in Patch 11.1.7, which marks the return of Warband-wide Undercoin transfers!
What Are Undercoins and Why Do They Matter
Undercoins are a currency from delves that you can use to purchase various cosmetics, mounts, and pets, at the Delver’s Headquarters in Dornogal. This is a welcome change for players with multiple alts who do not want to farm delves just to get the cosmetics.
A Brief History of Undercoin Changes in Recent WoW History
Undercoins were initially transferrable between alts on the 11.1.5 PTR.
On March 6, however, Blizzard disabled transfers on live servers, as confirmed on the official forums.
The ability to transfer Undercoins was back on the 11.1.7 PTR, but we were not sure if that was intended or not. With Patch 11.1.7 now live, we can confirm the Warband-wide Undercoin transfers are still possible!
