A license (American English) or a license (British English)  is an official authorization or authorization to do, use or possess something (as well as the document of such authorization or authorization).  A license is usually entered into by an explicit or tacit agreement. The licensor must accept the certificate, which can be proven in writing, or the licensor must agree to the exercise of the licence. In addition, unlike many other contractual agreements, a license is not in return, a license can be established with or without it. Those entering into a licensing agreement should consult a lawyer, as there are complexities that are difficult to understand for those who do not have a deep understanding of intellectual property rights. In the United Kingdom, prisoners who serve a certain sentence (a firm time in prison) are released “under licence” before the completion of their full sentence.  The license is the prisoner`s agreement to maintain certain conditions, such as. B regular reporting to a probation officer and to a single authorized address, in exchange for early release. . .