If you’ve ever wondered why you would want to hire a Certified Arborist over any other tree company operating without one, read the following Code of Ethics that every Certified Arborist is required to sign before they can be recertified. Although not all companies operate according to these ethics- some companies will have employees become Certified Arborists to use the title only- once you interview a tree care company, and the Arborist(s) that work there, you will know if they operate by these Ethics.
Here is a link to the article: http://www.isaarbor.com/certification/resources/cert_Ethics_CACodeofEthics.pdf
We hope this helps you in making informed decisions about who will be caring for your trees and your property!