The equity of exoneration applies to any relationship where the objective intention of the parties is that the burden of a joint debt should fall on one party, not just husband and wife. Where a line of credit is drawn down in stages, the relevant time for assessing the equity of exoneration is when each specific drawdown occurs, not when the original facility was established. The traditional language of 'presumption' of exoneration is better understood as an inquiry into the manifest objective intention of the parties from all the circumstances.
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