Anies, former governor of Jakarta, said he plans to file a complaint after official results are announced but did not provide other details.
“We plan to file to (the Constitutional Court) for sure but the content is not something that we can disclose,” he told reporters.
The move comes as parties supporting Anies and another presidential candidate, Ganjar Pranowo, gear up to launch a parliamentary investigation into the government’s conduct in the lead-up to voting day and alleged election violations.