An oral agreement, that is, an oral contract, is valid. According to civil law, there are two forms of concluding a contract: the first is oral form, and the second is written form.
 An agreement or contract concluded orally is valid as long as it is based on the true intention of both parties.
 According to the law, the parties may enter into a contract in written, oral or other forms. Where laws and administrative regulations provide for the use of written form, it shall be in writing. If the parties agree to adopt a written form, they shall adopt a written form.
 [Legal Basis]
 Article 469 The parties may enter into a contract in written, oral or other forms.
 The written form is the form in which the contract, letter, telegram, telex, fax, etc. can tangibly express the contents contained.
 Data messages that can physically represent the contents contained and can be accessed at any time by means of electronic data exchange, e-mail, etc. are regarded as written forms.