How do you ask someone how to spell their name in french?

There are a couple of ways to ask someone how to spell their name in French:

Formal:

* Comment s'écrit votre nom? (How is your name spelled?)

* Pourriez-vous m'épeler votre nom, s'il vous plaît? (Could you spell your name for me, please?)

Informal:

* Comment on écrit ton nom? (How do you spell your name?)

* Peux-tu m'épeler ton nom? (Can you spell your name for me?)

You can also use a phrase like:

* Je ne suis pas sûr de savoir comment écrire votre nom. (I'm not sure how to spell your name.)

Bonus:

If you're unsure about the pronunciation of their name, you can ask:

* Comment prononcez-vous votre nom? (How do you pronounce your name?)

Remember that when asking for someone's name, it's always polite to be clear and respectful.