The activities preceding contract formation (pre-contract activities) are divided into several categories. First and foremost, these activities include drafting of acts which constitute soft law, including adhesion and standard form contracts, general conditions of contracts, and clauses. Furthermore, pre-contract activities include calls for tenders preceding formation of construction contracts, creation of authorial works made to order, and sometimes other contracts, such as purchase contracts. The purpose of a tendering process is to collect as many tenders as possible and select the most advantageous tenderer to award the contract to. The third category comprises negotiations, which are part of major and more complex contracts. Negotiations do not oblige conclusion of a contract, which means that parties are allowed to suspend negotiations or terminate them adhering to the principle of conscionability and good faith. A tender and acceptance thereof refer to all contract types. A tender can be submitted by both parties to a contract. In terms of legal nature these legal acts are unilateral. The fifth category comprises the pre-contract – a contract whereby parties oblige to form another contract and agree on its important details. In terms of legal nature, this contract can be unilaterally or bilaterally binding. The last category of activities comprises letters of intent and other pre-contract agreements, which are mainly used in trade relations. The category includes letters of intent, commissioning letters, comfort letters, contract clauses, memoranda of agreement and memoranda of understanding.