Kitchen refurb, new plumbing and electrics stuff, do I need paper work from the them?

[Notagoodmonth]

I've had a new kitchen fitted do I need paper work for any reasons?

New light fittings, electric oven replacing an old gas one etc, induction hob replacing gas, new plumbing for dishwasher. Do I need paper work for it? Thanks

Your plumber should give you a gas safety certificate if he installs any new appliances, I had new gas hobs & was given a certificate.

No gas all electric now, but old gas pipe closed off?