Years after an insolvency proceeding is closed, can a solvent co-lessee/working interest participant (WIP) still be on the hook for their former partner’s share of unpaid Crown royalties? A recent Alberta Court of Appeal decision to allow an appeal in Spartan Delta Corp v Alberta (Energy and Minerals), 2025 ABCA 181 [Spartan Delta], raises concerns around whether the answer to such question can be 'yes'.