From Guild Wars 2 Wiki
Nafni was the Guild Promoter that used to be located in Trader's Forum. He survived the attack on Lion's Arch and could be found in the Vigil Keep in Gendarran Fields before returning to Trader's Forum.
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|Letter of Thanks||Consumable||Fine||2 0||10|
|Eloquent Letter of Thanks||Consumable||Masterwork||20 0||100|
|Lengthy Letter of Thanks||Consumable||Rare||2 0 0||1000|
|Sincere Letter of Thanks||Consumable||Exotic||20 0 0||10000|