Canonum De Ius Positivum
Canons of Positive Law
IV. Consensus
4.5 Consensus Dispute and Extinction
Article 137 - Duress
Canon 2367 (link)
Any Consensus Instrument sealed and consented under Duress has no effect.
Canon 2368 (link)
Any testimony given under Duress has no validity and cannot be used as Evidence in any Competent Forum.