There are such instances in the Thai criminal law like all other countries of the world. But most people are confused about these two offences. Defamation is a major offence where the offender says to a third person about bad thing of another person, by which the person may be damaged, insulted or hated. For example, Mr. A says to Mr. B that Ms C has had sexual intercourses with Mr. E who is not her husband. It dose not matter whether what he says is true or false. The punishment is imprisonment not more than one years and fine not more than twenty thousand baht or both. If defamation is done in writing or with pictures, the punishment is twice as much.
But an insult is a petty offence where the offender says something rude to look down upon the insulted person face to face mostly with impolite and impossible words. For example, Mr. A yells at Mr. B “you are a wild guy who is worse than a pig!” The imprisonment for that is only one month and fine not more than one thousand baht or both.
HOW ABOUT DEFAMATION AND INSULT HERE?