Risks and liability of hiring a runner?

[Aaron Nelson]

I'm looking to hire a runner to pick up signs, lock boxes, to post vacate and other notices on tenants doors (which can be scary sometimes), and to do a basic interior walk through on our rentals a few times per year. I've been doing these tasks myself up until now.  

I'm concerned that I may be opening up a can of worms since I don't know employment law well enough. What if the employee has a wreck?  What if something happens to them at a property?

Anyone have experience with this? What's the best way to limit my liability? While we're at it, do you have a system that you make the runner follow for completing these, or other, tasks?