Legal Maxim
Ei incumbit probatio qui - The onus of proving a fact rests upon the man.
Ei incumbit probatio qui dicit, non qui negat - The burden of the proof lies upon him who affirms, not he who denies.
Error, qui non resistitur approbatur - An error not resisted is approved.
Ex dolo malo actio non oritur - A right of action cannot arise out of fraud.
Ex nudo pacto actio non oritur - No action arises on a contract without a consideration.
Ex turpi causa non oritur actio - No action arises on an immoral contract.
Exceptio probat regulam - An exception proves the rule.
Executio est finis et fructus legis - An execution is the end and the fruit of the law.
Source: InRebus.com.