Hanafi
The sources give no view for it here.
الخلع دون سلطان
هل يصح الخلع دون حاجة إلى سلطان؟
Each school’s answer
Hanafi
Not stated in the sources
Maliki
Not stated in the sources
Shafi'i
Not stated in the sources
Hanbali
Not stated in the sources
The texts
مسألة: يصح الخلع من غير حاجة إلى سلطان، خلافا لما يحكى عن الحسن وابن سيرين؛ لأنه معاوضة كالنكاح.
«الإشراف», al-Qadi Abd al-Wahhab p. 726
From the schools’ own books
Maliki
The sources give no view for it here.
Shafi'i
The sources give no view for it here.
Hanbali
The sources give no view for it here.
What bears this mark is in our words, our standard wording; the books’ texts stay as they are.