For lia­bil­i­ty pur­pos­es, you are always under con­tract until the ser­vice is ter­mi­nat­ed. What you need to know is how much notice is required to can­cel your exist­ing mon­i­tor­ing agree­ment. If you have been with the com­pa­ny for longer than your ini­tial con­tract term, a min­i­mum of 30–90 days writ­ten notice is required to can­cel ser­vice. For your spe­cif­ic noti­fi­ca­tion peri­od, read the terms and con­di­tions on the back of your con­tract or con­tact your exist­ing mon­i­tor­ing provider.