| A | B |
| Genuine agreement | Valid offer and Valid acceptance |
| Voidable agreement | injured party can recend |
| Rescission | backing out of a transaction |
| Ratification | conduct suggesting being bound by contract |
| Duress | improper threat or act to obtain an agreement |
| Threat or illegal conduct | crime or tort, always duress |
| Economic duress | courts look at threat and alternatives available to the party |
| Undue influence | one person wrongfully dominates another party |
| Unilateral mistake | incorrect belief by one party |
| Induced mistake | voidable |
| Mutual mistake | bilateral mistake |
| Misrepresentation | satement cannot be opinion |
| Expert opinion | treated as fact |
| Intent and injury must be proven | Fraud |
| No injury | no fraud |
| Proven fraud | available damages |
| Punitive damages | punishment |
| Approval of voidable contract | ratification |
| Reliance | buyer used information supplied by the seller to make a buying decision |