Adjudication of stamp duty means to pass a judgement or to adjudge how much stamp duty is payable for the registration of a particular document. When the quantum of stamp duty is variable and not fixed, it may often lead to confusion as to how much stamp duty is payable. If the stamp duty is under paid, the document may not be admissible as evidence in a court of law. Hence, to determine stamp duty payable, the government offers an adjudication services, where the government officer examines the document and determines what amount should be paid as stamp duty. This adjudication is final and binding on the government in the particular matter and gives peace of mind to persons wanting to pay the correct amount.

Determination of the stamp duty by process of adjudication is binding on the government, but if the parties to the document want to challenge the decision of adjudication they can do so (see below).