This note was given to me by Wolten Grafe (https://everquest.allakhazam.com/db/npc.html?id=2813) for completing Drosco the Zombie (good) (https://everquest.allakhazam.com/db/quest.html?quest=552).
The quest it is required for is called 'Errand for Wolten' https://everquest.allakhazam.com/db/quest.html?quest=553
His dialogue when giving it:
Wolten Grafe says: 'Events have transpired which put all agents of righteousness in danger. We can not explain all as yet. Take this note to Freeport. You will give it to Eestyana Naestra at the Hall of Truth. Beware, now. The Shrine of Bertoxxulous now knows of your allegiance. Give me any other item you may have found on Drosco's body.'