What is the etiquette when interpreting the kanji of someone’s name?

Hello! I’m writing about a character who is Japanese and I think the kanji spelling I’d like to give them is a little unusual and would likely be mispronounced if reading it literally as it’s written. It made me wonder, what is the etiquette when reading aloud someone’s name from just the kanji? Would people generally ask how to read someone’s name if seeing it written down in kanji without having heard it before, or are they likely to assume and potentially mispronounce it at first? I know that hiragana is typically used in informal contexts so it likely wouldn’t be an issue there, but in more formal contexts, like on a form or on a business card I assume the kanji would be seen first.

by Prior-Ad258