I was recently reminded of this one and thought I would share. Every once in a while I get a customer who falsely inflates the services that they claim to want with the intention of getting you to give them a discount and then they try to cancel the other half of the work. Example: I want treatments, aeration, overseeding, mulch, etc. Then, after you perform some of the work, they try to cancel the rest or just cancel half of the line items on the estimate and hope you don't realize what they are doing. If you give them a line by line discount you have lost money when they do this. I have never been 'taken' by a customer trying to do this but I had one recently who was trying to do this. Remind them that discount only applies when they pay up front for everything.