Overview
- The electoral court published definitive province-by-province Boleta Única de Papel (BUP) designs and activated voter tools, including padron.gob.ar and the Vot‑A WhatsApp assistant.
- The BUP places all party lists on a single district-specific sheet with two formats depending on whether senators are elected, and voters mark, fold and deposit the signed ballot directly in the urn without an envelope.
- Authorities outlined chain‑of‑custody safeguards such as numbered, barcoded, sealed booklets delivered in bolsines, and reminded voters that photographing ballots carries a ARS 77,000 fine.
- Roughly 36.48 million people are eligible to vote to renew 127 seats in the Chamber of Deputies and 24 Senate seats in eight jurisdictions, across 17,398 polling places and 109,046 mesas.
- In Buenos Aires, intensive trainings and material checks continue, and judicial officials said printed ballots cannot be altered or reissued—such as changing a candidate image—due to traceability protocols and distribution deadlines.