Tahren return of non-magical items has the third person name, instead of saying you.

give potion tah
You give a potion of transference to Tahren the Noldarian Smith of Battle.
Tahren inspects a potion of transference closely, snorts, then hands it back to Eulinda.
Tahren the Noldarian Smith of Battle says to you 'Not a bit of the taint on that, Eulinda. Might be better off using it to kill mages.'

n/t