How do I add an age-based discount for ages 65 and up to my contactless card?

How do I know if my age-based discount for ages 65 and up was successfully added to my card?

I’m not receiving my discount for ages 65 and up even though I qualify – what do I do?

What do I do if I can’t add an age-based discount for ages 65 and up to my contactless card?