Welcome to our NS Community, Vale. What do you mean change? You can apply for a OV-chipcard renewal through: https://www.ov-chipkaart.nl/terminate-or-replace/what-to-do-with-an-expired-card.htm.

IF you have a current NS subscription, then the new card should be announced to come some 8-10 weeks before expiry, with the question if old foto can still be used or not. Then it is free.

IF you simply have a personal card (with foto+name on) and want to have a same one after expiry, then go via ov-chipcard and pay 7,50. It is wise to open an account with them-you can then follow procedure and link old card to new.

Hi guys, thanks for your answer. What I meant is that I had OV card and it expired. I have a new one for couple of months and I want to connect it to my NS.

It should be possible via https://www.ns.nl/en/mijnns#/dashboard (bottom of the screen) After that, you can delete the expired card (if you don’t need it anymore for e.g. Transaction History).