Most presales fail on uncertainty before any question about the token arises. You pay today for something that does not yet exist, with no specification you could enforce, no delivery date you could rely on, and no obligation on anyone to build what was described. Islamic contract law requires that the object of an exchange be defined - and a whitepaper describing intentions is not a specification. There is a genuine exception in Islamic law for paying in advance for goods not yet in existence, called salam, but its conditions are strict precisely to control this risk: the goods must be specified by measurable attributes, the delivery date fixed, and the price paid in full at contracting. A token whose eventual function depends on whether a team delivers does not meet the specification requirement. Beyond the contract, the empirical record matters: a large majority of ICOs have failed or turned out to be fraudulent, which is context rather than a ruling but is not irrelevant.
Current direction: Needs Scholar Review. This page needs a qualified scholar to verify the exact ruling before a reader relies on it.
Educational guidance only, not a fatwa. Consult a qualified scholar for your specific case. Page created August 30, 2026.
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Because after launch the thing exists. You can see what it does, what it is worth and whether the team delivered. In a presale you pay against a description of intentions with no enforceable specification, no reliable delivery date and frequently no obligation on anyone to build it. Islamic contract law requires the object of an exchange to be defined, and a whitepaper is not a specification.
Salam exists but its conditions are strict, precisely because advance payment is risky. The goods must be specified by measurable attributes, the delivery date fixed, and the price paid in full. A presale meets only the last. A token whose function depends on what a team later decides to build cannot be specified the way a quantity of wheat can, and there is usually no enforceable delivery obligation at all.
It is context rather than the ruling itself. The objection stands on the contract's uncertainty regardless of outcomes. But studies of the ICO wave found a large majority failed within a year or proved fraudulent, and presales are where rug pulls concentrate - which is precisely the pattern the prohibition on undefined exchange exists to protect people from.
Costs the discount, removes the uncertainty
Purchasing a screened token on the open market after it functions means you can see what you are buying, what it does and whether the team delivered. You forgo the presale discount, which is the price of not paying for a description.
Screen the token's use case and the project's activity before buying, exactly as you would a company.
Evidence used to explain the general principle. These references do not replace personal scholar review.
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