We are planning to roll out a feature that sends either an OTP to the end customer at the time of dispatch of an order or implements a QR code to ensure that the order is delivered to the correct customer. What may be the edge cases here to ensure correct delivery of orders and no failures for the feature? Thanks!

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    Can you add more detail? As it is now, there's not enough information to answer. Platforms involved, intended use of QR code, thread model . . . – Kevin McKenzie Jan 24 '19 at 21:18

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