iLaw, a human rights NGO, has gathered, this past weekend, more than 50,000 signatures to amend and/or redraft the constitution the group said.
The conservative royalist group Thai Pakdee said on Sunday that it too had gathered more than 150,000 signatures to prevent amendments to the constitution.
However, critics say that while iLaw required people to register with ID to put down their names, Thai Pakdee was relying on a Google form which could be filled out by anyone.
Protestors and opposition parties have been calling for the amendment of the constitution, which was drafted by the previous junta, over the past two months with large street protests and forums being held.
With the government’s approval, there are now two constitutional amendment petitions that will be discussed in parliament on September 23 and 24.
The NGO said that they have gathered 53,746 signatures as of Sunday which means they have now surpassed the initial requirement to form a formal petition to parliament.
iLaw started their petition in January.
“If iLaw also made their petition online, I believe they would have gathered more than a million signatories already,” said Watana Muangsook, the Pheu Thai MP and strategist.