проверьте перевод, плиз law

[FIrina]

Нарушения обязательств, за которые законом или договором предусмотрены штрафные санкции со дня, когда Заказчику стало известно о таких нарушениях;

Мой вариант
Violation of the obligations, which results in punitive penalties under the contract or law from the date when it came to the Client knowledge

[_03]

Failure to fulfill/default on any obligations incurring/involving application of penalties commencing from the date at which this/such events of non-performance becomes/become known to [the] Customer/[the] Customer becomes aware of...

[PERPETRATOR™]

Any failure to comply with the obligations which entails penalties, under either the law or the contract, from the date the customer learns of such failure

[langkawi2006]

Как вариант:
breaches of contractual obligations which give rise to liability for damages under the law or this contract, starting from the date the Client became aware of the default