Illegal consideration – this legal term origins from the word “illegal”, which literally means against the Law”, and the word “consideration”, which means careful thought. In the Administrative Law it refers to enforced act or promise, which turns to be harmful for the public (State) interests and against the established public order. For example, if the Tax Office promises to the citizens no taxes to apply. Such a promise, if really enforced, is against the governmental interests, because almost every country forms its budget from the collected taxes.