Assassination contract

Assassination Contracts are contracts sent by Lorenzo de' Medici to Ezio to assassinate key people responsible for certain nefarious deeds. Ezio finds these contracts in pigeon cages, similar to the way Al Mualim sends them. These contracts are acquired in the same order regardless of which cage was chosen.

Day at the Market
Lorenzo explains that there is a plot to cut off Florence's supply line, which can be prevented by assassinating a merchant located in the San Marco district. It is relatively simple. He is standing next to an Art Merchant. Use Eagle Vision to detect him easily.

Fallen Archers
Several Pazzi Archers were spotted attacking the Palazzo della Signoria, tracked down to the San Marco district, the largest district in Florence. There are 3 of them and they are spread out quite thinly, so it may take a while to reach them.

Political Suicide
Lorenzo claims that a member of the Signoria was working with the Pazzi to turn the tide against the Medici. They are meeting in a pass, therefore, concealed from rooftops. Each side is guarded by 3 guards. It is best to hire some Courtesans to distract the guards and use some of them to conceal you from your target. You cannot be detected by him or you will be desynchronized.

Caveat Emptor
It seems that a member of the Salvucci family who helped smuggle enemies into Florence has been sighted. Find the target and kill him without being detected. He has one guard following him, but he's pretty slow.

Meeting Adjourned
Several enemies are planning a meeting in the city; you have to tail the only known lead and then kill all those affiliated. Tail him and he'll walk into a heavily guarded room. Your number of targets increases as you have to kill all those responsible. It is simplest to toss a Smoke Bomb and start assassinating everyone.

Needle in a Haystack
Lorenzo remarks that we are so close to eliminating all those responsible for the attack on Florence. One of the conspirators have been spotted near the Santa Maria Novella. The target will be in one of the courtyards within the area. It appears to be entirely random as to which garden he appears in.

Peacekeeper
A contingent of traitorous guards are planning to march to Lorenzo's palazzo, Ezio has to kill them before they start a riot. The timer only starts once you have sighted them. They are just west of the bridge, where the guards are composed of 10 Brutes. It is easy to dispatch of them by tossing a Smoke Bomb and assassinating or poisoning everyone.

Leader of the Pack
Several condotierri who attacked Lorenzo's palazzo are regrouping; Ezio has to tail one of them to their garrison and kill their leader. First things first, make sure you're full on Smoke Bombs. Find the target, then tail him for awhile. As you tail him, more and more guards will start to follow him. You will get to some alley entrance that's guarded. There should be some Courtesans nearby, hire them to distract the guards then run into the garden area that's full of enemies. Smoke Bombs and the Hidden Blade should finish this. Otherwise, Air Assassinating the leader would work as well.

Reap What You Sow
One of the benefactors of the Pazzi has been found in a farm East of San Gimignano. First go the View Point located conveniently near your target, then perform a Leap of Faith into the hay below. This cart of hay is also conveniently placed adjacent to your target, so assassinate him from the Hiding Spot. If he spots you when you did not do the aforementioned strategy, he will run away from you, but you can still catch up and kill him.

Don’t Get Your Hands Dirty
There are 4 guards who want Lorenzo dead. Your task is to have these guards killed without appearing to have killed them yourself. It can be very difficult because several of the guards are on towers and mercenaries and thieves cannot climb tower walls. However, it is possible to just push them down or kill them without using any weapons, your fists. You can also, more simply and stealthily, poison them and wait.

Supply In Demand
A local guild leader has been supplying the Pazzi with arms. Your task is to tail one of his men to find him then kill him. After tailing the member, simply assassinate the leader while running to him.

Flee Market
There are several conspirators who plot against Florence. Make your way toward the area and dispatch of the Archers first to avoid being detected. Then, perform a Leap of Faith from the pigeon marker into the cart of leaves. After this, double-assassinate them. For best results, hire some Thieves to attack the Archers instead, diverting the guards' attention to them, then assassinate both of the targets.

Vertical Slice
There are several Borgia soldiers in the vicinity who may be planning a Coup. Your task is to kill them without being seen, as Rodrigo Borgia might use your involvement as an excuse for a war. Use Ezio's ledge and Hiding Spot assassinations to its fullest as most of the targets are archers. If possible, observe the enemies' movements to get a look at how to assassinate them efficiently.

No Camping
There are enemies who have gathered in camps around the city. Kill their leaders as quick as possible. Go to each area whilst air assassinating the leaders. Fighting the leaders is possible, however they are accompanied by many guards in the vicinity.

Showtime
One of the people responsible for hiring the condotierri who attacked Florence has been spotted. He regularly takes a walk around the countryside, ambush him in the Ancient Roman Theater. Tail the target to the Theater, then approach him from the opposite side of the landmark to avoid conflict with the guards as much as possible.

Thin The Ranks
Kill six people without them noticing you. There are six guards posted in pairs, on three different locations in the city. Double assassinations are easily made

Beginnings of a Conspiracy
Some of Girlamo Riarios men broke in to the Palazzo Pitti and stolen a valuable map. Ezio needs to kill these three men wihtout getting spotted. First make sure you are filled up with poison, kill the guard close to the fountain using mercinaries, then walk towards the target one the left side of the map, poison him. make your way to the last one and  

Arch Enemies
Some Borgia archers has to be taken care of, and fast. Ten archers posted on the roofs of the buildings on the edge of the river, you got two minutes to clear the roofs. The Throwing knifes works perfectly for this job, free run between the houses and kill all the archers on the way.

Wet Work
A boat has been seen scouting for a suitable place for an attack. Kill the captain. First make your way to the boat either swimming or taking a gondol. takeing out the guards in the smaller boats will make this task easier. when ready sneak abord the boat and kill the captain. Smokebombs can be used with great profit.

Dead On Arrival
Kill the courier before he leaves. He is located not far from the pidgeon coop and can be easily killed with throwing knifes.

Go Towards The Light
You need to kill the guard at the lighthouse. Keep the Guards outside the lighthouse busy using the mercenaries not far from there, then make your way top the top of the lighthouse and assassinate him.

Mark And Execute
You must kill the one who captured one of Lorenzo's spies without being detected. Make your way towards the target, make sure you are filled up with throwing knives, poison and smokebombs just in case since this is quite tricky. First, pick out your throwing knifes and kill the archers on the roof. Then sneak up behind the target and put a dose of poison into him, then just get out of there.

Trivia

 * During Sequence 14 and the free-roaming sequence, these contracts are still playable even though Lorenzo is already dead.