It says the written contract is the complete deal — wiping out prior promises, emails, and verbal assurances that didn’t make it into the document. If a promise matters, it must be IN the contract.
The entire agreement clause (also called a merger or integration clause) is why "but they told me…" fails. It declares the written document the complete and final agreement, superseding everything said or written before — sales promises, email assurances, verbal side deals. Courts generally honor it by excluding evidence of prior promises that contradict or add to the writing. The practical rule it creates is simple and unforgiving: any promise you’re relying on must appear in the contract itself. The salesperson’s assurance about what the service includes, the landlord’s promise to fix the heating — if it’s not written in, this clause is designed to make it unenforceable.
Generally no — the clause exists to exclude them. Exceptions like fraud exist but are hard to prove. Get promises in writing, in the contract.
Yes, by written amendment — most contracts with merger clauses also require modifications to be in writing and signed.
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