I'm sure most of you have encountered a situation where the the customer tells you they want some landscpaing/lawn work done. You finished completing the job, you go and knock on the door to collect the money and let them know you're finished. You knock and knock and nobody answers the door, or doesn't pay immediately. What do you guys do? ie) I finish a lawn job, I go knock on the door. Nobody answers, I knock for about 10-15mins. What do you guys do then?