Wass Tingsamit Analyzes Constitutional Courts Election Ballot Barcode Ruling, Raises Major Question for Thai Society

Former Supreme Court senior judge Wass Tingsamit provides a detailed analysis of the Constitutional Court's ruling on barcodes and QR codes on election ballots, posing a significant question to society about where the boundary of "secrecy" should lie in Thailand's democratic system.

29 Sep 2026 GMT+7 Mr. Wass Tingsamit, an independent scholar and former Supreme Court senior judge, posted a message on Facebook following yesterday (28 September) when the Constitutional Court issued its ruling and judgment on the case regarding barcodes and QR codes on election ballots. (Read more:Constitutional Court's unanimous 9:0 ruling on "QR codes" and 8:1 on "barcodes" on election ballots is constitutional) analyzing the Constitutional Court's decision concerning "barcodes and QR codes" on election ballots and the battleground of interpreting the "principle of secret ballot" throughFacebook,he stated that

this has become a heated debate in legal and political science circles following the Constitutional Court’s ruling on 28 September 2026 (Case No. Tor. 30/2569) regarding the use of QR codes and barcodes on ballots for members of the House of Representatives in the general election on 8 February 2026, finding that these do not violate the constitution. While legally this upholds the election's legitimacy, the substance and reasoning of the ruling raise thought-provoking questions about the limits of citizens’ rights and freedoms and constitutional interpretation standards in Thai society.

1. Constitutional Court Rulings: Differences Between "Green Ballots" and "Pink Ballots" The complaints in this case were based on the principle that printing QR codes and barcodes on election ballots might allow traceability to determine which voter voted for whom, violating the constitutional principle of secret ballot. However, the court separated the facts into two parts:

1) Constituency election ballots (Green ballots) - QR Code

• Unanimous 9 to 0 decision held that using QR codes does not violate the constitution.
• Facts: The investigation found that the QR code on the green ballot is for administrative purposes only and cannot be linked, traced, or used to identify the voter.

2) Party-list election ballots (Pink ballots) - Barcode

• Majority vote 8 to 1 held that using barcodes is constitutional.
• Technical facts: The investigation found that the barcode on the pink ballot can indeed be traced back—from the ballot number and voter list sequence to the political party mark selected.
• Majority reasoning (8 judges): Although technically traceable, the Election Commission’s primary purpose for using it is to identify ballot batches to prevent fraud and cross-district usage. No evidence shows any person or agency has scanned the data to identify voters. Coupled with strict post-voting ballot storage, this does not destroy the essence of secret voting.
• Dissenting opinion (1 judge - Mr. Napadon Thepphitak): The technical traceability of barcodes is sufficient to deem them unconstitutional and a violation of freedoms. Citizens should not face the risk of the state being able to check their votes.

2. The Paradox: Judgment vs. Policy Recommendations The most interesting aspect of this ruling is the Constitutional Court’s obiter dictum recommending two key policy actions for the Election Commission:

1) Redesign ballot printing to exclude any marks or symbols that link voter identity with their vote results.

2) Implement strict and special measures for storing disputed ballots to prevent illegal access to voting data.

This raises significant legal observations because on one hand, the court ruled the barcode system "is constitutional and storage is already secure," but on the other hand, it warned the Election Commission to "stop using identity-linked symbols and improve storage safeguards." This warning indirectly acknowledges the pink ballot barcode system’s risk to secrecy and its impact on "public trust." The court chose a pragmatic path: legally validating the election to avoid nullification while admonishing and ordering practical improvements.

3. "Conditional Secrecy" and the Clash of Constitutional Intent The ruling established a key principle that secret voting under Articles 83 paragraph 2 and 85 paragraph 1 of the Constitution is not absolute secrecy but a "conditional secrecy" that must balance with ensuring fair and honest elections under Article 224 paragraph 1 (2).

This leads to two main legal debates:

- Supporters (pragmatic and outcome-focused): The Election Commission needs technological mechanisms to prevent ballot forgery or swapping. Without verification codes, fraud risks increase. Using barcodes balances public interest.

- Opponents (textual and fundamental rights-focused): Articles 83 and 85 clearly require voting "directly and secretly" without exceptions. The court’s approach overturning secrecy for election management is viewed as "reading non-existent words into the Constitution." - - -

4. Thought-provoking Question: If QR codes are acceptable on green ballots, why did the Election Commission choose traceable barcodes on pink ballots? One of the biggest doubts raised is the inconsistency and redundancy in the Election Commission’s technology choices, prompting the critical question: "Why did the Election Commission not use QR codes, which have been proven safe and non-traceable to voter identity, on party-list (pink) ballots as they did on constituency (green) ballots, but instead chose barcodes on pink ballots that technically allow tracing back to individuals?"

The Election Commission explained that the barcodes on pink ballots serve as a security feature to identify the printing batch and the assigned district or polling station, preventing fraud and cross-district ballot use. This explanation has sparked intense technical debate.

• If the goal is to verify the print batch, why must the barcode be unique on every ballot? If the purpose is only to check batch or polling station, all barcodes in the same booklet should be identical, not unique per ballot allowing matching to voter list order and thus voter identification.
• The inconsistent technology choice is questioned: since QR codes on constituency ballots effectively prevent forgery without compromising secrecy, the Election Commission’s insistence on using traceable barcodes on party-list ballots raises concerns about respect for privacy and constitutional secrecy principles.

5. Comparison with International Principles De facto Secrecy vs. Security by Design Looking through the lens of international standards, comparative law divides secrecy into two forms:

1) De facto secrecy: The approach the Thai Constitutional Court uses — as long as there is no evidence of barcode misuse to reveal voter identity, secrecy is considered intact.

2) Security by design (absolute secrecy): The strict international standard holds that secret voting systems must prevent any possibility of linking voter identity to vote results from the start (irreversible).

A clear example is the 2009 ruling of the Federal Constitutional Court of Germany on electronic voting machines, which held that election processes must be transparent and publicly verifiable, with systems guaranteeing absolute secrecy by design. Any technical risk allowing vote tracing, regardless of state promises of secure storage, is unconstitutional.

The former Supreme Court senior judge concluded by noting the gap between constitutional text and political reality: this Constitutional Court ruling (Case No. Tor. 30/2569) marks a significant milestone reflecting a pragmatic approach to avoid political crisis and the massive costs of nullifying an election.

"However, regarding public confidence and the rule of law, this ruling leaves a major question for Thai society about where the boundary of 'secrecy' should lie in our democracy. As long as the key to identifying voters remains, even if securely stored, public trust in voting freely and without fear will inevitably be undermined."