This invention includes a tax authority computer readable medium having a set of delinquent tax records wherein each delinquent tax record contains delinquent tax information representing a real estate property that has delinquent taxes; a posting computer readable medium in communications with the tax authority computer readable medium; a portable computer device having a portable computer readable medium and a digital image capturing device capable of communication with the posting computer readable medium; and computer readable instructions for receiving delinquent tax information, capturing a digital image of a tax notice posted, generating posting information including the date and time and the digital image, and transmitting the posting information to the posting computer readable medium.