I called and got this customer on the schedule for an annual fire alarm inspection. I arrived and tested the panel and each device to make sure they would function in an emergency. I needed to change out two batteries. I did that and wrote the report. Once done I gave them my card and said they would need this done annually. I asked if they wanted me to call them when it was due. The said yes and we made a rotatable work order so that we do not miss this customer.