Germanshepherdsmum
I don’t frequent beauty salons GG, but I remember the trouble when a local so-called beauty therapist was sued. She had no insurance and went bankrupt. As I said, the industry is largely unregulated so I would consider the certificates on the wall pretty worthless.
They have a public liability insurance certificate displayed at the one I use, is that worthless? The competency certificates are usually NVQ or City and Guilds, which are recognised bodies, so I think they hold some credibility.
I can see if you used a self employed therapist visiting your home there could be issues, but the survival of beauty salons rests on their reputation and they only employ competent, qualified people in my experience.