i cleared the warehouse prior to quest and had the info, i placed note back in bag and waited over a week, and still wont let me finish the quest. please fix this bug for the PS3
did you open the note? like you were going to read it? it did that to me, and I read it. & the objective told me to go give it to the Jarl.
The bandits will spawn one by one and that takes a long time. You need to kill them all to finish the quest. You can check back a few in-game days later.