No, you just get paid twice, for example the 2nd and the 30th, the same as you always do
I get paid fortnightly, some months I will get paid thrice
( Malaka omdz, Mon 29 Jun 2009, 10:09, archived)

It depends if it's for the end of year accounts or not
Some companies like to split their payroll at the year end to make the accounts easier.
( Maximinimus you stick around I'll make it worth your while, Mon 29 Jun 2009, 10:11, archived)