someone told me some councils//insurance co. dont accept napit certificates. Can it be true
You are asking quite a different question here.
Technically they should accept any certs from any of the schemes, but as already said in earlier posts, LABC's are a law unto themselves and it varies widely, some indeed do insist on NIC accreditation, this is wrong IMO.
To clarify:
This is for if you wish to contract for the LABC, they will accept certs from any of the schemes for your own customers notification.