Which scenario could render a contract void?

A scenario that involves a contract related to illegal activity can render that contract void because contracts must have a lawful purpose to be valid. When a contract is formed around actions that are against the law, such as agreements for illegal drug sales or any other unlawful business transactions, the contract cannot be enforced by either party. This principle is foundational in contract law, as the legal system does not support or recognize agreements that contravene statutes or public policy. In essence, agreements that promote illegal activities lack the essential legitimacy required for a contract and are therefore void from the outset.

The other scenarios might involve complications or enforceability issues, such as needing a signature for formal agreements or discussing revisions; however, they do not inherently invalidate the contract like the involvement of illegal activity does. In the case of implementing terms without a signature, while there may be challenges in proving the intention to be bound by the contract, it does not automatically render the contract void. Similarly, revisions can be made collaboratively as long as both parties consent to the changes, and changes made post-agreement might lead to negotiations but do not eliminate the validity of the original contract unless they pertain to legality.