In South Qeynos, the guard Kwint tells you to go to Lions Mane and tell Earron Huntlan Kwint sent me. He will give you a voucher for one free drink that you are suppose to take back to Kwint. But if you turn it into Earron Huntlan you get a small amount of xp and the following faction hits:
Merchants of Qeynos -25
Cirlcle of Unseen Hand +5
Antonious Bayle -3
Coalition of Tradefolk -2
Guards of Qeynos -5
If you hand the note to the barkeep Nug Rellash (next to Earron) you get the following factions:
Merchants of Qeynos -5
Circle of Unseen Hand +1
Antonious Bayle -1
Coalition of Tradefolk -1
Guards of Qeynos -1
He also gives you a very small amount of xp and the lore Free Ale that does not sell to merchants. That is where this item comes from.