I'm getting grumpy now. Opus energy who don't supply my energy keep sending letters to my office trying to recover outstanding payments for the previous occupier. The period on the invoices and letters ends two months before I moved in. I asked them to supply my electricity, but they don't do new small business accounts, so I went with British Gas, and Opus billed me from my initial meter reading up to the transfer, pointing out they were allowed to do this, and at a premium price - but all paid and forgotten. They have my business name, my name and it's done. However, the letters are all addressed to the occupier, not the name of the previous firm. I speak to them on the phone and they say they will sort it. They have, by giving it to a debt collection agency, who are also directing strong letters to the occupier. I have written to them pointing out I'm not responsible and neither is the tenant upstairs - we both get our energy elsewhere. I have even given them a link to companies house where the previous company is clearly dissolved and the name of the previous person clearly listed. I've told them not to keep bothering me, but I suspect they well. Any tips to get this sorted. I don't like vague threats, but equally, I don't want to spend my time trying to phone and email. My plan now is just to ignore them? What do you think?