On the contrary, contract for service is a pure contract of the civil (mandatory) law on the basis of which a contractor works for an orderer autonomously and independently of the orderer of work, works for another but not in the service of another, works for his/her account and on his/her own risk, in a useful and not in prescribed working time or working time determined by the orderer, in doing which he/she may work individually, i. e. can entrust a task to a third person since he/she is responsible for the service and is obliged to perform it in a way that it corresponds to the skills of a trade, because he/she is responsible for the weaknesses of his work under the principles of civil and not labour law, and receives compensation for work (service).