Compelling Tribute (Imperials)

Background
"Legate Rikke has sent me to investigate the possibility of blackmailing Anuriel. As Laila Law-Giver's Steward, she might be able to provide important information and assests."

Walkthrough
Return to Legate Rikke. After speaking to the Legate she will give out an assignment to go to The Rift. Travel to Riften and go to Mistveil Keep. Sneak into the room on the right which objective marker is pointing to. Check the drawer and collect the Incriminating Letter. Watch out for the guard that roams the hallways there when trying to sneak in. However, if the Thane of Riften title is held, walk on in freely without the guards noticing or caring. Once in possession the letter, confront Anuriel. Talk to her until she reveals the desired information. There is also a Persuasion check that will net some hefty coin if passed. Eventually she will inform of a shipment of coin traveling to Windhelm. It is possible to be attacked outside in Riften by three Stormcloak Soldiers, the people of Riften will fight the soldiers, and some of them may die (usually Bolli), as such it is recommended to dash over and kill them before they can do any damage

Travel back to the Imperial camp and talk to Legate Rikke and give her the information received from Anuriel. Rikke will now tell give orders to meet up with the other legionares to take the shipment. Travel to the marker (near Shor's Watchtower) and meet up with Hadvar. He will tell of a plan for getting the shipment. Either follow the plan or go head on first fighting the Stormcloaks. Either way defeating the Stormcloaks will get the shipment. Looting the caravan for goods and gold holds no ill effect. Once the caravan is taken report to Hadvar. He will give orders to go back to camp and report the progress to Legate Rikke.

Travel back to the Rift Imperial Camp and report to Legate Rikke. After reporting to the Legate, this quest is finished and marks the beginning of the next quest, "The Battle for Fort Greenwall".

Bugs

 * Some players are reporting a bug after finishing the Regaining the Pale quest. After reporting to General Tullius and meeting Rikke in the Rift Imperial Camp, Rikke still has the dialogue as is The Battle for Fort Dunstad was never completed. If this happens load an old save before helping the Imperial soldiers take the fort. Instead travel to Dawnstar, preferably late at night or early in the morning when everyone is asleep. Find Jarl Skald (his bedroom is the ground floor on the right). Attack him until he takes a knee. This will complete The Battle for Fort Dunstad. After reporting to General Tullius, Rikke's dialogue should be fixed to start Compelling Tribute.
 * When looking for the incriminating letter there will be no marker and there will be no letter in the drawer, the quest will then be impossible to complete.
 * Upon completing the main quest to swap Riften with the empire, this quest will be seen as completed, but when you search there will only be the quest to regain the Rift, making it impossible to continue with the civil war quest without going to a previous save.
 * Upon securing the Shipment of gold and weapons from the Stormcloaks, when you sometimes loot the carriage it can have an unforeseen consequence. Upon returning to Legate Rikke she will become hostile on sight, and will attack you until you have died (even during a random Dragon encounter she will choose to attack you over the Dragon). One way to resolve this bug is to either reload from the last save before looting the carriage. Another way is to attack her until she drops to her knees twice, which will often remove any hostilities and allow you to finish the quest (also, when dropped to the submissive position the first time, a large sum of 1200 may be inexplicably added to the players inventory).
 * Attacking the Stormcloak caravan before talking to Hadvar will make the quest will be impossible to complete. This can be fixed by completing the main quest.
 * After defeating the caravan, Hadvar will not enter conversation with the player. Instead, he will say multiple random Imperial quotes such as "Been so long since I killed a Stormcloak, my sword arm's getting flabby".
 * Solution: Dual-cast Calm on Hadvar with Hypnotic Gaze and Kindred Mage perks.
 * The above does not work. (Tested Xbox with level 67 Illusion, dual cast with the above perks taken).
 * Saving in front of Hadvar and restarting the game fixed the problem.