1. PayPay for Developers FAQ
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  3. Are there any precaustions in using the back key?

PayPay for Developers FAQ

Are there any precaustions in using the back key?

No, there are no constraints in using the back key. However, please note the following:
- the back key on merchant's home page must work to go back to the PayPay App screen.
- the back key after the payment process requires appropriate processing to avoid duplicate payments. 

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