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In a decoupled authentication scenario, the challenge parameter in the threedsdata data block will be equal to D, and the challengeurl and challengerequest parameters will be absent (block 8). The merchant must in this case keep the order in the In Process state and await the final payment status.

IPS Assist will receive the result of this verification on its server in asynchronous mode (blocks 13, 14). Depending on the authentication result and the settings of the processing and of the enterprise (block 15), the IPS Assist will executes a transaction in processing or completes the operation with an error.

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