This study investigates the attitudes of staff users toward the payment of overdue fines in Nigerian Polytechnic libraries. A survey was applied to staff users of the libraries of the Delta State Polytechnic Oghara-Otefe, and Delta State Polytechnic. A total of 87 staff participated in the study. A questionnaire and oral interview were used in data collection. Findings reveal that staff users rarely pay overdue fines and would like the system discontinued. The study affirmed the fact that fines are a means of generating funds for the library and a measure to compel users to return books on time. The unwillingness of staff to pay fines and of circulation staff to collect from staff users are challenges in enforcing payment of fines. The study makes recommendations to help libraries collect fines from staff users.