Soldiers and police went to a house of a red-shirt member in Udon Thani province on Monday to query her calendar with the image of former prime ministers Thaksin and Yingluck Shinawatra.
Wassana Kenhla posted on Facebook saying soldiers and police separately came to her house in Non Sa-at district on Monday to ask where she had obtained the 2019 calendar.
The one-page calendar comes with the pictures of the two former prime ministers in the red background.
Ms Wassana later told Matichon and Thairath Online that she had four copies of the calendar at home and gave one to the soldiers in the morning and another one to the police later in the day.
She said somebody gave her about 60 copies of the calendar when she went to the Dusit District Court on Oct 30 on her rally for elections.
She did not elaborate but iLaw reported on its website she was among a number of suspects arrested by authorities for defying a ban on political gatherings by holding a rally on May 22 to mark the fourth anniversary of the coup. She was released with no bail requirements two days later.
The website of the Thai Lawyers for Human Rights said the district court on Oct 30 asked them to come to hear the ruling by the Constitutional Court. The defendants wanted the Constitution Court to decide whether the ban of the National Council for Peace and Order was valid.
The district court said the decision had not been made and set Jan 22 next year for the ruling.
Ms Wassana is reportedly a member of the United Front for Democracy against Dictatorship (UDD). She set up a centre at her house on July 13, 2016 to monitor the constitution referendum but was ordered to close it the next day by authorities. She was later sent for an attitude-adjustment session at a military camp.
The centre was set up by the UDD in June 2016, with the command centre supposedly at the Imperial World shopping mall in Lat Phrao. But the red-shirt members were forced to abort their launch of the centre after police stormed the location.
Ms Wassana said the soldiers who came to her place on Monday were frequent visitors. "I have only two copies of the calendar left and I won't give them to anybody anymore," she said.