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A formal warning or notice given in advance to prevent later claims of ignorance.
在租赁合同中，房东勿谓言之不预，提醒承租人房屋设施的维护责任。
In the lease agreement, the landlord gave advance notice reminding the tenant of maintenance responsibilities for the property.
Commonly used in legal and contractual contexts to emphasize that a party was informed beforehand.
This idiom is often used in contracts to protect one party from future claims of lack of information. For example, '勿谓言之不预，本合同条款自签署之日起生效' means 'Don't say you weren't warned—the terms of this contract take effect from the date of signing.'
Always document warnings or notices when using this idiom in legal documents to ensure enforceability. Verbal warnings alone may not suffice.
Derived from classical Chinese legal and administrative texts, where officials would record warnings to prevent future disputes. The phrase appears in historical documents like the 'Zhou Li' (周礼) and later in imperial legal codes, emphasizing the importance of documented prior communication.
This idiom is typically used in formal or legal contexts to underscore that a party had been properly informed. It carries a tone of finality, suggesting that the warning was clear and should not be ignored.