Bitcoin's change back

Bitcoin's change back

I'm starting a new project that uses bitcoin. I'm afraid some feature can't be done, or aren't safe. I'd like to validate some ideas:

I'll create a wallet/address and publish it on the project's website. All customers are supposed to pay/transfer BTCs to the same address (identify the payment is not a problem).

Eventually, I'll need to refund a customer.

  • 1) Is it safe to refund the customer using the same address he/she used to pay me?
  • 2) Can I continue using the same address for receiving BTCs after a refound?

I know that, when you send money to another address, the change back is sent to another address (still yours).

  • 3) Can I send a % of a wallet to an address and the remaining/change back to a new address (totally different wallet/private key) in the same transaction.
http://ift.tt/2AaTGiR

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