"Senior citizens who are frequent Metro users are finding it difficult to generate an e-pass.
That is why we have decided to make things easy for them," said Kolkata Metro Railway chief public relations officer Indrani Banerjee.
Those who do not have smart cards can buy new ones from counters at the station.
Earlier, the Kolkata Metro Railway had made e-passes mandatory for commuters (irrespective of age) travelling in the North- South line.
According to Metro sources, around 20,000 passengers travelled on the first day and the total earning was over Rs 11 lakh.