Is the surety (Dhamin) permissible for every debt for which a pledge (Rahn) is permissible?
Chapter on Guaranteed Salaf (Advance Payment) for a Specified Term
Al-Mughni
Book of Sales
Primary text
The surety is permissible for everything for which a pledge is permissible. Conversely, if a pledge is not permissible for a debt, then taking surety for that debt is also not permissible, with three exceptions.