/\ This. Slightly surprised so many people have such a poor understanding of debt and finance in general. You can’t be financially liable for someone else's debt if you haven't specifically applied with them or agreed to b a guarantor, even if your partner/spouse dies, that's a probate issue for the executor of the estate to deal with. If someone defaults on a debt, a bailiff/HCEO may require a spouse/partner/housemate to prove ownership of goods/assets (statutory declaration time), but they can't chase a third party, even in death the executor isn't personally liable. An exception to the above is divorce where it's not uncommon for one party to take finance and the other party to retain the asset/benefit eg wife finances a car in her name and husband retains it post split, any settlement will take account of one party being left with £xxxxx of debt and the other having £xxxxx of linked asset, but as you're generally talking about a situation where both parties have assets, they tend to be offset against other stuff.