Akkarasorn Opilan, the niece of Progressive Movement leader Thanathorn Juangroongruangkit, reported to the Technology Crime Suppression Division (TCSD) on Thursday to answer a lese majeste charge.
The 17-year-old was accompanied by her lawyer, Krisadang Nutcharat.
The charge against Ms Akkarasorn was related to a Feb 13 social media post concerning clashes between police and anti-government protesters in front of the Criminal Court.
The post disappeared but not before it was captured by netizens.
A support group for victims of cyberbullying, led by Naengnoi Asvakittikorn and Noppadol Promprasit, later lodged a complaint against Ms Akkarasorn with the TCSD accusing her of violating the lese majeste law.
Thursday's meeting with the TCSD police was postponed from last week.