I know twin brothers who have a long name (very common in some parts of India). So when they moved to US apparently they both were issued same SSN number becau

I know twin brothers who have a long name (very common in some parts of India). So when they moved to US apparently they both were issued same SSN number because the SSN system registered the name backwards ( last -> middle -> first) which exceeded the limit and the first name which was unique got changed to FNU (First name undefined). It took them years to figure out they both had same SSN.