Political parties can also abuse the system by splitting their party into two, if this is allowed by electoral law. One subdivision of the party contests the constituency seats, the other contests the list seats. This will produce an overhang. They can co-ordinate their campaign and work together within the legislature, while remaining legally separate entities. This can also give other advantages in areas such as party funding.
For instance in the Italian general election, 2001, one of the two main coalitions (the House of Freedoms, which opposed the MMP system), linked many of their constituency candidates to a decoy list (liste civetta) in the proportional parts, under the name Abolizione Scorporo. As a defensive move, the other coalition, Olive Tree, felt obliged to do the same, under the name Paese Nuovo. The constituency seats won by each coalition would not reduce the number of proportional seats they received. Between them, the two decoy lists won 360 of the 475 constituency seats, more than half of the total of 630 seats available, despite winning a combined total of less than 0.2% of the national proportional part of the vote. In the case of Forza Italia (part of the House of Freedoms), the tactic was so successful that it did not have enough candidates in the proportional part to receive as many seats as it in fact won, missing out on 12 seats.