Do:

• Write it on paper (or stamp it in metal), kept offline.
• Two copies, in two separate safe places.
• Treat it like cash that can't be cancelled.

Never:

• Photograph or screenshot it.
• Put it in email, notes apps, cloud drives, or a chat.
• Type it into any website or send it to "support."

Remember: no one — including MotePay — can recover it for you. That's the point of self-custody, and why these habits matter.