I have a problem collecting my money from my customers and I know it is because of the system I have. My collecting system consist of me knocking on the door when I am finished. This type of system worked when I was a relatively small company. Now that I have grown into a larger business I need to get a new system of collecting my money. I want to send a bill to my customers, but the thing is that most of them are my neighbors and are in walking distance from my house. So I don't want to waste money on stamps, but I need to do something different and more convenient. I also don't want to lose contact with my customers because I have been personal with them since the day I started back when I was 15 years old and that seems to have gotten me a lot of referrals. I started with 4 customers my first year and 3 years later I have about 30 steady customers. I don't advertise at all, my only advertisement is by word of mouth. Well anyway now that I am 18 with my landscaping business growing and me going to college, a respectable college too, I am finding it harder to collect my money. So any suggestions about how to make it easier for me and my customer please let me know. Thank you to all in advance.