This gets mentioned a lot in the context of therapy. There was a short interesting sub-discussion in the would you know if your therapist lied to you about whether unconditional positive regard was a therapeutic lie or a therapeutic intervention/technique.

I'm not saying it's either - certainly both of mine did their best to show such a regard for me. Whether it had any effect on me is doubtful.

I'm skeptical that even the most effective therapist can achieve this unconditional positive regard, though. This is mainly because not only does it seem that it would take a lot of work, but it's also not something that comes easily to anyone. I have it for only family and close friends, for instance. I try to have it for students, but it tends to just mean giving them the benefit if the doubt in that context, and my sense is it means something more in therapy.

So: does it exist, is it possible, and does your therapist (try to) utilize it?