[4][5] Como did not obtain the necessary federal licence before 30 June 2017, the latest possible date to enrol in the 2017–18 league, and were subsequently excluded creating a second vacancy.
[6][7] On 6 July, FIGC's Co.Vi.So.C announced that Akragas, Maceratese, Mantova and Messina did not submit a copy of their bank guarantees.
[8] Maceratese, Mantova and Messina chose not to file appeals and were excluded from the division,[9] however, Akragas, Arezzo, Fidelis Andria, Juve Stabia and Modena all successfully appealed the initial decision and on 20 July it was confirmed that they would all remain in the division.
[12] On 6 November, Modena was officially excluded from the league and dissolved after failing to attend four consecutive matches due to financial irregularities.
If tied after regular time, semifinal winner decided by extra-time and penalty shootout Cosenza promoted to Serie B. Loser on aggregate is relegated.