duh, the alarm is a security system which has requirement to have tamper circuit to detect tampering.
Gabs Security goes to Mrs Smiths house & fit a system, she gives the code to Robin B'stard the painter.
Robin B'stard, lets himself in every day to paint the house whilst Mrs Smith suns herself in glamorous Cleethorpes
Robin takes the lid of the panel & links out a no. of circuits as advised by google / a popular alarm forum,
A month or so after being paid for the painting Robin returns & does the gaff over.
Mrs Smith return home to find her valuables gone,
blah, blah, blah.... would normally end with legal tift & attempt to sue the alarm co.