Checkeeper is an online platform that offers check printing and mailing services to individuals and businesses. It enables users to design and print their own customized checks on blank check stock or regular paper using their own printer. The service also includes the option to digitally sign checks, maintain a secure digital record of transactions, and integrate with popular accounting software for streamlined financial management. Checkeeper aims to simplify the process of check issuance, helping users save time and reduce the costs associated with traditional check writing.