Plundering Pardons

Plundering pardons is easy to set up very difficult to execute. As time goes on I hope to come up with a better method. For now all I can say its best done in a group.

First you need to become hostile to Venice. It is important to pay attention to this because your status with a country goes down quickly at that point. If you aren't careful you will end up wondering why you aren't being attacked. It is possible its because your status has dropped under hostile.

Second you need to make sure you have all of the plunder/ seize cargo(if you don't have seize cargo this is practically impossible) college skills equipped.
-Successful Plundering 1 & 2
-Rare Item Plunder

Third go outside Venice and keep your sails low and  slowly sail forward. Make sure caution is turned off! The fleet will not attack you if your caution is on.

If you did all of this right then the fleet 'Venetian Royal Navy' should ambush you with a huge fleet. They hit hard and if you go alone they will melee and swarm you until you die. At the least you need two people: one in a turtle and the other doing the plundering. The one in the turtle should spam repair and surgery while thinning the crowd a bit.

If you do everything correctly you will be plundering pardons in no time. Just be patient and good luck!

Recap:
Hostile to Venice.
Equip: Successful Plundering 1 & 2, and Rare Item Plunder.
Sail outside Venice.
Be attacked by Venetian Royal Navy.