Constitutional Court Rules Election Barcodes Do Not Violate Constitution
Thailand's Constitutional Court ruled that barcodes on February's parliamentary election ballots do not violate voting secrecy protections, upholding the election's validity after months of legal challenges.
The Constitutional Court ruled on September 28, 2026, that barcodes and QR codes printed on ballots from the February 8, 2026 parliamentary election do not violate the Constitution, and the election remains valid. Judges held deliberations and delivered the ruling at 2 p.m. at the Constitutional Court office after more than five months of hearings and witness testimony in Case No. 30/2026, which questioned whether the barcode and QR code system on ballots could be traced to identify voters and their choices, thereby compromising voting secrecy.
The case originated when images from media outlets showed election officials holding up ballots displaying barcodes during the February 8, 2026 vote count—a practice that had never occurred in previous elections. The Ombudsman received 22 complaints from citizens and various organizations before referring the matter to the Constitutional Court for constitutional interpretation under Article 213. Complainants argued that the ballot format violated multiple constitutional provisions by potentially allowing votes to be traced back to individual voters.
The court heard testimony from five witnesses, including Election Commission officials and representatives from the companies that printed the ballots and managed ballot storage procedures. The Constitutional Court ruled by a 6-to-3 vote that the barcode system on constituency ballots, which are identified by volume numbers on the stub, only generates unique QR codes when twenty eligible voters receive the same ballot volume and vote for the same candidate. The court found that the constituency ballot design does not directly link individual voters to their choices, thereby preserving ballot secrecy and complying with the Constitution.
