Carsat email scam?

A warning if you are in receipt or in process of having your french pension awarded. I received an email yesterday supposedly from them saying they had received my bank RIB but my name did not exist and they needed my birth certificate to confirm who I am. Well I know its not correct because they already pay me for another pension so have the bank details plus they have had my birth certificate for many years. There was also no record of this on my personal page of their website, so just be aware that some of these scammers are trying anything these days to get your details.