Piper, we work for a fridge company.

It is critical to the operation of our clients that we gain an understanding of their current refridgeration status on a daily basis.

please call (every number in town) and ask them "Is your fridge running"

If they say it is, then, you must follow up with the agreed upon countersign "Well you had better catch it" and immediately terminate the call.

An alternative might be to ask lots of mundane refrigeration questions, replying to each one with "that's cool"