Adjudication means determining the chargeability of stamp duty on instruments. The authority to be approached is the Collector of Stamps appointed in each District. Application for adjudication should be accompanied by true copy or an abstract of the instrument and also with such affidavit or other evidence as may be necessary to prove that all facts affecting the chargeability of the instrument have been truly set forth in the instrument. Adjudication can be done both for signed as well as unsigned documents.