Preventive detention based on speculation fails when passport seizure undermines any material basis for future smuggling risk.

Preventive detention under the Conservation of Foreign Exchange and Prevention of Smuggling Activities Act was held unsustainable where the authority's satisfaction rested on speculation rather than concrete material. The seizure of the detenu's passport materially undermined the claimed likelihood of continued smuggling activity, including within India, and prior interceptions were treated as insufficient to support the detention basis. Because the asserted future prejudicial conduct was not backed by real evidence, the detention order was quashed.

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Issues: Whether the detention order under the Conservation of Foreign Exchange and Prevention of Smuggling Activities Act, 1974 could be sustained when the detenu's passport had been seized and the alleged likelihood of further smuggling activity within India rested on no material.

Analysis: Preventive detention requires a real and material basis for the authority's satisfaction. Where the passport was already in custody, the inference that the detenu would continue smuggling activities, including within India, had to be supported by concrete material and not by conjecture. The reasoning that further smuggling could continue despite the seizure of the passport was treated as speculative and insufficient to justify curtailment of liberty. The Court also found the respondents' reliance on prior interceptions immaterial to the validity of the impugned detention.

Conclusion: The detention order could not be sustained and was quashed in favour of the appellant.

Ratio Decidendi: A preventive detention order is invalid where the alleged propensity for future prejudicial activity is founded on mere speculation rather than material evidence, especially when existing facts such as seizure of the passport effectively negate the stated basis for detention.

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