Spal lost to Ternana, but still earned a dramatic last-gasp promotion into Serie A after 49 years thanks to Benevento beating Frosinone, while Carpi stalled Verona.
It looked as if the party would be postponed yet again when they fell 2-1 in Terni, but news filtered through that Frosinone had conceded a stoppage-time strike to lose in Benevento.
That proved enough to push Spal over the edge and their second consecutive promotion, having played in Lega Pro last season, with a return to Serie A for the first time since 1968.
The Ferrara-based side were relegated in the 1967-68 season, and spent many of the subsequent years in the lower divisions.
Last season, the Spallini secured promotion to Serie B for the first time since 1992-93 after winning the North/Central division of the Lega Pro.
The club went bankrupt several times, most recently in 2012.
As for Frosinone and Verona, they will have to wait a while longer and it remains to be seen if there will even be a promotion play-off this term.
If there is a 10-point gap between third and fourth, there is no need for play-offs.
Click here for the full Serie B section, including results, fixtures and tables.
Benevento 2-1 Frosinone
Puscas 43 (B), D Ciofani 57 (F), Ceravolo 93 (B)
Cittadella 2-0 Vicenza
Vido 14, 52 (C)
Verona 1-1 Carpi
Letizia 39 (C), Ganz 82 (V)
Latina 2-2 Perugia
Mustacchio 23 (P), De Giorgio pens 38, 83 (L), Dezi 72 (P)
Novara 2-0 Entella
G Sansone 43 (N), Orlandi 51 (N)
Pro Vercelli 2-2 Brescia
Coly 13 (B), Blanchard pen 25 (PV), Mammarella 64 (PV), A Caracciolo 81 (B)
Salernitana 2-0 Avellino
M Coda 66 (S), Improta 89 (S)
Spezia 0-0 Pisa
Missed pen: Granoche 93 (S)
Ternana 2-1 Spal
Antenucci 12 (S), Pettinari 18, 33 (T)
Trapani 1-2 Cesena
Ciano 20 (C), Maracchi 32 (T), A Rodriguez 84 (C)
To be played on Sunday