Hi Missk. There are, unfortunately, some people from 'that' profession who seem to think they dictate the laws and rules. I suspect a lot of it comes down to their job often involving the issuing of 'threatening' letters on behalf of their paying clients, which are successful in achieving their aims - even tho' they didn't have any actual valid case to act on. The mere threat is enough. You have a superb paper-trail from the sounds of it, and you have wisely kept it that way. So, at the moment, you issued a quote for a 'full' job, they trimmed it down saying they'd tackle some of the tasks themselves, you issued a revised quote and they accepted this? Cooool. When you look through the details of the revised quote and compare it with what you have actually done up until now (and what you intend to do to finish it), do they correlate closely? Is there any way they can dispute what an item on there is? Is it crystal clear? If so, I would be tempted to do as Phil says - fulfil your part of the agreed contract so that - as you've said yourself - you will have done everything that was expected of you. (If this situation does become murky, it will be a huge added complication if they can start claiming "you walked off the job" or "didn't complete the agreed works" or "was unreliable" - I fear they are the types who will try it all on. In fact, they may even be hoping you do this...) Reply by email, attaching 'for their reference' the revised quote you both agreed on before you started the work. Mention it was all agreed 'as per your acceptance by email dated...'. Inform them your intention now is to (a) fulfil that revised and agreed contract, (b) expect full and prompt payment as per your usual terms and agreed at the beginning, and (c) that you will then enter into discussion about further works. (And, of course, you'll have the option of just walking away...). I'd finish by giving a date on which you will turn up to do this - make it as soon as possible. At the same time find out which legal organisations they belong to (does this couple have a website, or letters on their headed paper?), and make enquiries about the 'code of conduct' all their members should abide by. You can even start making discreet enquiries into this, giving an outline of the scenario to the organisation but not so much detail that they could work out who you are referring to. Also explore what type of Ombudsman overlooks these legal organisations - there has to be someone out there to whom complaints about solicitors can be levied. Keep the paper trail going! If you stick to doing the 'right' thing and also stick to your guns, I think there will come a point when they will realise they haven't a leg to stand on, and to pursue the issue would land them deeper and deeper in the poo... Don't give any inkling at the moment that you are looking 'behind the scenes' at the moment - just play it innocent and by-the-book.