Marked Cards

The marked cards are a miscellaneous item in Fallout: New Vegas.

Characteristics
The marked cards can be found in the Aerotech Office Park in Aerotech suite 200 in a desk.

Captain Parker has a beef with a gambler named Keith. You can get Keith in trouble by telling Captain Parker that Keith is using these cards to cheat. You still get to keep the cards, and you get a decent amount of caps as a reward.

Bugs
When dropped, these cards float in air and can even be jumped on, creating a step ladder which the player could exploit.