How can I pay my fines? Dale Jarrett April 15, 2019 18:02 Updated Follow You may pay your fines online, at any library self-check kiosk, or by mailing a check to Douglas County Libraries at 100 S. Wilcox Street, Castle Rock, CO 80104. Learn more about Fines, Fees and Borrowing. Related articles What is my library card number and PIN? I think I lost a library book. What should I do? I lost my library card. What should I do? How long is my hold on the hold shelf? How do I log in for the first time? Comments 0 comments Article is closed for comments.