The paper deals with the issue of filling seats without voting in elections to councils in municipalities with up to 20,000 inhabitants. In comparison to the local elections held in 2014, the number of such cases increased by 77% in the 2018 elections. It appears that the applicable election law, in particular Article 418 § 1 (the division of municipalities into single-seat constituencies), Article 434 § 1 and 2 (the election organisation rules applicable when the number of candidates equals the number of available seats), and Article 478 § 2 (the procedure for proposing candidates for the position of municipal leader or town mayor) of the Electoral Code, combined with the conditions determining local electoral competition, may facilitate the occurrence of the phenomenon of non-competitive elections that results, among other things, in low voter turnout.