Does Faction matter? I've been hunting Karnors, and am now Dubious at the OT outpost - will this guy just eat my scroll and not give me anything in return?
KoS will not work obviously, and since my Ikky necro could not walk past the Golem/Iron Sentinel I did not attempt a hand in. However, I put an extra 50+ spell in my shared bank slot. Logged off and created a new, Dark Elf toon and he conned apprehensive to all npcs at the outpost. Trade worked fine, handed him Thrall of Bones and received Sacrifice.
I never did have the courage to risk wasting a spell trying a turn-in to a dubious NPC, so all I did was make a level 1 DE Necro and had her do the turn-ins - worked perfectly - got 53 pet on second turn-in.