What should I, the Landlord, know about meter theft?
Check your seals.	Check that the meter is totally sealed. including the terminal cover. Physically pull each seal to check that it hasn't been pushed back in.
Check the meter shell	Check the meter shell for tiny drill holes, cracks, gaps (between the front and rear halves of the meter). Anywhere that a piece of wire can be inserted to stop the wheel.
Check the terminals	Check around the cable entries for signs of burning. A common 'fiddle' is to 'bridge' the outside terminals thereby bypassing the meter.  This nearly always leaves burning or scorching of the insulation surrounding the cables. Some older meters have an link which can be seen inside the terminal cover attached to the live terminal. Check this hasn't been undone.
Card Meter theft.	Keep a log of all card sales and if you get suspicious ask for the old card to be returned before the new card is supplied. If your tenant is obtaining cards from elsewhere you will know because our cards are unique to ourselves. Check the number of cards inserted (the meter gives you this) against the number of cards supplied.