I have a letter saying that the invoice has been paid in full for Roofing Services but no invoice (it does say receipt at the top) and it has no VAT or VAT number on it. Can you claim back VAT on this? If we do would I have to find out if the company is registered for VAT?
Unless you have a VAT receipt, you generally can't claim the VAT back. There are words from HMRC on their website about this.
I believe there are a few exceptions (others may want to comment on that?) but, without an independent receipt detailing the service received, amount paid etc, you've really got no room for manoeuvre.