Kui lepingupooled on kirjalikus lepingus kokku leppinud, et lepingus on ette nähtud lepingu kõik tingimused (välistav tingimus), ei loeta lepingu osaks lepingupoolte varasemaid tahteavaldusi ega kokkuleppeid, mis ei sisaldu lepingus.
(Merger clauses)
A contract in writing which contains a clause indicating that the writing completely embodies the terms on which the parties have agreed cannot be contradicted or supplemented by evidence of prior statements or agreements. However, such statements or agreements may be used to interpret the writing.