No, you should not add any additional markings to your final design. All of our printed products will automatically trim the necessary 1/8" bleed. Any additional markings will run the risk of being visible when printed.
When personalizing your card, what you see in the preview is what will print.
For more information on how to properly add bleed, please visit "What does the designer mean by "bleed"?" and/or "Why does my design keep getting cut off on the site?"