I use the GagePack software. It has the capability to auto send an email Notice to who ever you want. However, my company will not allow the software utilize this. So what I have to do is generate a Report with the tools that are due for the coming month and save it to a certain place. I then create an email and send a Notice that they may have a tool due. They need to go the certain location, review the report, find the gage that's coming due, and then let me know of any conflicting problems, (Holidays, vacation, in a test, broke, lost, etc). I have to pick it up and return it, but that allows me to :get things ready". It works but I too find that people get complacent.