I had my boiler serviced 2 weeks ago by a very experienced gas safe plumber, who was highly recommended to me by two different friends. He spent well over an hour checking over my whole heating system, bleeding radiators, explaining bits to me and giving advice. He charged £70 which I was really pleased with. The thing is, I've just remembered that in the past I've always been given a certificate after a boiler service (or maintenance record, I think it's called). I didn't get one this time. Does that matter? I don't plan to sell the house any time within the next year, so it's just for my own records really. I'd feel silly asking for one now, especially when he was so thorough and reasonable. Is the paper bit optional?