I don’t think they have a discount for disabled travellers, but they might be able to offer a companion pass, depending on your friend’s disability. 

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Engelli yolculara indirim yaptıklarını sanmıyorum ama arkadaşınızın engellilik durumuna göre refakatçi kartı sunabilirler.

You can ask via the chat function or submit a request to Eurail here: https://eurail.zendesk.com/hc/en-001/requests/new

Will they give her a free card because she is disabled?

Desteğiniz için teşekkür ederiz

thank you for your support

I don’t think so.

They might give you a free pass if you are her caregiver. I suggest you get in touch with Eurail directly. Use the link I posted above.

I don't know the exact rules about it.

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Öyle düşünmüyorum.

Onun bakıcısıysanız size ücretsiz geçiş izni verebilirler. Doğrudan Eurail ile iletişime geçmenizi öneririm. Yukarıda paylaştığım bağlantıyı kullanın.

Bununla ilgili kesin kuralları bilmiyorum.

Hi @zeynep,

We have a special offer for disabled travellers who need assistance during their travels: a complimentary Pass may be issued for the accompanying caregiver after submitting some requirements to our customer service team.

I can see that the team has been able to provide you with the feasible support. I hope it will be helpful for you! :)