Piyarat “Toto” Chongthep was accused of installing a placard criticising the king in Kalasin province, northeast of the capital, Bangkok, in 2021.

A court in Kalasin today dismissed the case against the People’s Party MP on grounds of insufficient evidence, according to the Thai Lawyers for Human Rights (TLHR) group.

“The court gave the defendant the benefit of the doubt,” it said on X.

Piyarat was still expected to face a further two royal defamation charges, TLHR said on X.

Acquittals on royal defamation charges are rare in Thailand, Noppol Achamas, an information officer at TLHR, told AFP.

Piyarat hailed the decision.

“The court has made the decision, there was not enough evidence to show that I was there at the scene,” he told AFP.

Thailand’s monarchy is protected from any criticism by a lese majeste law, with each offence punishable by up to 15 years in jail.

Critics say the government has used the legislation to silence dissent.

More than 270 people have been prosecuted for lese majeste since 2020, according to TLHR.

In September, a court sentenced pro-democracy activists Jatupat Boonpattararaksa to three years on a royal insult charge.

In July, another democracy activist Parit Chiwarak was sentenced to two years in prison on the same charge.