As @Shelley159 suggested, you can send a payment request to the guest post-stay. However, the guest is gone and has no incentive to pay attention to your request. There is no penalty for non-payment too. Sending requests for excessive utilities is certain to earn you poor reviews.
If you have excessive utility usage by your guests, you need to rethink your bottom line. How much will it cost if a light burning, hot water running, iceberg AC or Desert Valley heat lover stays in your property? Raise your rates to accommodate high utility costs -- then you will be okay. Many guests feel entitled to use our properties any way they like because "they paid for it". Conservation is not a consideration.