|Complete Where Angels Fear to Tread||27||Bounty Board (Eridium Blight)||3274 XP, $959, SMG or Grenade|
It seems that Marcus had a little too much to drink last night and accidentally mailed out some refund checks, so he wants you to retrieve them for him. This mission requires some good knowledge of the Eridium Blight map, as it can be confusing to go from one area to the next. The reason for this is because you have a time limit that starts as soon as you go and collect the first check.
One good place to start is the check at the center of the map, as this one is slightly isolated from the others and can only be reached from the west side. From here, you can quickly jump over the cliffside and use the Catch-A-Ride to spawn a vehicle, driving yourself to the eastern side of the map to the next one. Note that you only start with three minutes, but each check you get adds another three minutes.
As should be obvious, ignoring enemies that spawn is the best idea, although you may get overwhelmed in some areas. The last three checks are fairly close together that you shouldn't have to worry about the time limit. You'll be finished with the mission as soon as you collect the final check.