Sales law is a branch of civil law and essentially includes all legal provisions that affect the rights and obligations of sellers and buyers when concluding a purchase contract.
The purchase contract is the most frequently concluded contract in everyday life. The legislature has therefore regulated the purchase law in detail in Sections 433 ff. of the Civil Code. Under sales law, the purchase contract can usually be concluded orally. There are exceptions, for example, when selling real estate, which requires notarial certification under the law of sale.
The subject of a purchase agreement is usually property, i.e. physical objects, but other objects such as rights, e.g. claims, can also be sold. Animals, for example, can also be the subject of a purchase contract under sales law, Section 90a BGB.