Suppressio Veri

Ignorance of law is no excuse.

It is a Latin maxim, which means ignorance of fact can be excused but the ignorance of law cannot be excused. Every person should know the laws of the country where he lives. He cannot plead ignorance of it. Even the foreigner has to abide with the laws of the land as long as he happens to be in that country. This maxim is often used in Criminal Law.

Let the buyer beware

It is a Latin term of principle which implies that the buyers must be be aware and warned of the integrity of the product that they are about to purchase.

Against the morals or customs

This legal maxim is of latin origin meaning against morals, or customs, or good way of life. All contracts are considered illegal if they are contra bonos mores. These can be reduced to several classes: (1}Incentive to crime, which is a claim that cannot be sustained, therefore, on a bond for compounding a crime or for procuring a pardon. (2}Indecent consideration, or mischievous consideration, is an obligation or engagement which is either prejudicial to the feelings of a third party, or offensive to decency or morality, is void.