Originally Posted by shovelracer
.... It is essential to have a document that clearly spells out the scope of work and payment schedule for both parties. .....
This may be true, but you do not need a contract or service agreement (one in the same) to make this clear. A simple letter of understanding you write makes that clear for scope, charges, and expected payment.
Some people try to make the business relationship far too complicated for simple services such as grass cutting, bush trimming, leaf removal, etc. These are mundane tasks that don't require anything complicated or worrisome to a customer.
If somebody showed at my door with a contract to cut my grass, I would tell them "No thank you," and move to the next LCO. Remember, none of us doing these simple services are offering nothing unique. There are ten others standing in line are willing to do the work without a piece of paper.
As stated above, honest people are honest people. A piece of paper does not make them any more honest.