Have you ever reported a 'childminder' who is not registered?

Why is it bothering you, OP? Is it any of your business what arrangements other parents make for the care of their own children?

I personally think if you are helping a friend or family by watching their child paid or not then it is a private arrangement and nobody's business and no need to be registered. What I disagree with is advertising yourself as. A childminder and taking on children who are strangers to you. Tht is wrong and needs reporting. I am a registered childminder btw .

Just to add that you don't need to register if offering up to two hours per day per child, like I do for one child twice a week and ad hoc for pre-schoolers (again only two hours).
I get paid for these hours, and am in the process of registering as a child minder. I have been totally up front with parents who enquire (there have been many who want to pay for more hours but it is illegal hence I only have one regular child)
Please make sure you get your facts absolutely correct as it can cause so much heartache for everyone. I had someone 'enquire' to my CM development officer and I felt awful. But I know, she knows and Ofsted know that I'm working within the law and have turned away lots of parents because I refuse to break it. Cannot wait to be registered though as I feel quite vulnerable. I wonder if those who mind over 8's ever get this?

Just checked ofsted site and you def don't need to register if you're related so that one is ok.

Well, she can look after her nephews and nieces without being registered, and if she says she looks after the friend's children as a favour/without payment then Ofsted are unlikely to be able to prove otherwise.

An unregistered cm was reported at our school & from what I gather Ofsted paid her a visit, she said she just helps out a friend occasionally as a favour as they were friends of her own DC the same age so they went away without further investigation! She still looks after the same 2 siblings (1 pre-school & 1 school age) 3 days a week term time & definitely isn't registered.
Not saying you shouldn't report them but don't be surprised if nothing comes of it

Thing us it would be hard for ofsted to prove, they'd need to prove payment was being made and if she tells them it isn't I doubt they'd do much. Are they definitely not nieces/nephews/grandchildren too? You don't need to register to care for them and get paid.