Federal Act
on the Amendment of the Swiss Civil Code
(Part Five: The Code of Obligations)

¹ When as­sess­ing the form and terms of a con­tract, the true and com­mon in­ten­tion of the parties must be as­cer­tained without dwell­ing on any in­ex­act ex­pres­sions or des­ig­na­tions they may have used either in er­ror or by way of dis­guising the true nature of the agree­ment.

² A debt­or may not plead sim­u­la­tion as a de­fence against a third party who has be­come his cred­it­or in re­li­ance on a writ­ten ac­know­ledg­ment of debt.