Hello, I am a lawn care and landscaping company in IL. I read on your site that even if someone has not paid me for mowing for lets say 3 months ($500) I cannot place a lien on them correct? Because the service has to result in permanent value added to the property? Second I was wondering if it would be smart to had a notice of lien to any landscape contract that I am giving out as long as the job is over $500? I am currently just using a collection agency but am looking for something more effective. Again I am located in Illinois. Thank you for any and all advice.