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                    What is Reverse Penny Drop?
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                    How do we test RPD in Sandbox?
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                    Different Statuses in RPD transactions
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                    How do responses work for various bank accounts?
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                    What happens in a Mock payment?
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                    How do notifications work for RPD?
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                    How do refunds work?
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                    Why are we not able to make payments in the sandbox environment?
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                    Why are we not receiving notifications over webhook?
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                    Receiving 403 forbidden error on making requests?