Abstract A library is an institution of knowledge acquisition and learning it provides invaluable services to students, information server and to a wider local community. Several libraries have suffered failure as a result of inadequate management and incapacitations in handling sensitive information as regards members of the library. This research, therefore, aimed at developing a library offense documentation system, which will help to keep records of library offenders. In the course of the development of this new system, the current system was analytically and critically studied or assessed and thus the identified strengths and weaknesses were highlighted and a new system was designed for the weakness. The present system was analyzed using a standard procedure recognized worldwide for such purpose and this is called Structured System Analysis and Design Methodology (SSADM). PHP (Hypertext pre-processor) was used to code the program modules developed for the system using Dreamweaver.