In Singapore's contract law, duress is considered a vitiating factor that can make a contract voidable. Coercion involves using unlawful pressure or threats by one party, compelling the other party to enter into a contract against their free will. This pressure can take many forms, including physical threats, economic duress, or undue influence. The essential element is that the force applied is of such severity that it leaves the victim with no practical choice but to agree to the contract. However, proving duress can be challenging and often requires clear evidence of illegitimate pressure. If a court finds that an agreement was formed under duress, the contract may be set aside, and the parties returned to their original positions before the contract was made.