With no further information, paddyann, I assume she means she has a claim on a pension through a partner, deceased or living, but that will only bring in £80 a week, alhough she would then, presumably be able to claim Guarantee Credit, if she is living alone or widowed.
If she is single or cannot rely on a pension through a partner, then she has no entitlement that I can see, except possibly, UB.
However when she reaches 80 she will be able entitled to a pension of around £80 a week, whether she has made NI contributions or not. However, whatever she gets it will be a very small amount, and will get reduced if she receives money from any other source or has savings.
Personally, I would rather make payments and have a secure pension income in retirement, however small, which can be topped up with pension credit, than hope for the best and have to spend my retirement years below the poverty line and constantly having to be chasing every penny I get or justifying it to benefits officers.
Anyway, like many of these clever clever schemes that people think up to avoid paying tax, or paying for residential care, they tend to blow up in their faces because they were either urban myths or there is some small print they hadn't read that invalidates what they did/are doing.