You're talking about paper wallets.

Little printed pieces of paper with a public and private key, that act like Bitcoin "piggy banks". They're not considered "secure" because they can only be used for one outbound transaction, then the private key is exposed. But they can take as many deposits as you want.

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Thank you for your reply.

Just thinking of ways to help with adoption and tipping other than paper fiat.

We need a way to generate 10 paper wallets at a time, print them all out on one piece of paper. Then you could load them and hand them out, and everyone could have their own Bitcoin piggy bank. They just need to know to sweep the whole balance at once when they cash it out.

Agree! And I think the instructions can be on the paper for accessing and depositing.

Service industry seems like a good market for this.

How do we start?