Finite Incantatem

The General Counter-Spell[3] (Finite[1] or Finite Incantatem[2]) is a counter-spell for general use[3]. It may be used in duels or on an entire home, as a precaution before a wizard answers the door.[5] It is taught at Hogwarts School of Witchcraft and Wizardry.

It's currently unknown by who or when the counter-spell was invented. This spell is one of the seven covered in The Standard Book of Spells, Grade 2[3] by Miranda Goshawk.

Nature
The General Counter-Spell terminates all spell effects ranging from simple spells like the Jelly-Legs Jinx to more complicated spells such as Atmospheric Charms. It's unknown if there is a difference between Finite and Finite Incantatem, in terms of power or usage, it's possible that Finite is simply a more straight forward way of casting the General Counter-Spell.