With a sales contract, the seller undertakes to transfer ownership of the purchased item to the buyer against payment of the purchase price. In principle, the sales contract is not subject to any formal requirements and can also be concluded orally. The law provides for special formal requirements such as written form or even public notarisation for the purchase of consumer credits according to Art. 9 of the Swiss Consumer Credit Act (KKG), intellectual property rights, e.g. according to 33 (2)second of the Swiss Patent Act (PatG) and plots of land according to Art. 216 of the Swiss Code of Obligations (OR).
The general regulations concerning the sales contract can be found in Art. 184 et seq. OR.