Full Bench confirms settlement agreements reset the in duplum baseline

A financial services provider (Merchant Factors) obtained a monetary judgment based on a settlement agreement. The debtors, including a close corporation, a trust, and an individual who signed in his personal capacity, appealed. They argued that the in duplum rule should be applied against the original loan capital rather than the compromised settlement amount, that the settlement should be set aside for iustus error because the parties held differing views on the validity of a ceded suretyship, and that the individual signatory's liability depended on the underlying suretyship.

The court held: The Full Bench dismissed the appeal. It held that a transactio extinguishes prior obligations and substitutes a new capital liability, so the in duplum rule applies afresh to the compromised amount rather than the original loan capital. A mere difference in legal position regarding the validity of a ceded suretyship does not constitute iustus error and cannot ground setting aside a compromise. The individual who signed the settlement in his personal capacity is bound independently of any underlying suretyship — the settlement agreement itself is a distinct causa for his liability.

Legal impact: This Full Bench authority confirms that creditors structuring debt settlements can treat the compromised amount as the new capital baseline for in duplum purposes, preventing debtors from retrospectively decomposing it into original capital and interest to reduce the enforceable quantum. It reinforces the high threshold for setting aside a transactio and clarifies that sureties who sign compromise agreements in their personal capacity assume independent liability that survives any defect in the underlying suretyship. The decision carries persuasive weight nationally.