Abstract: A method for determining database accuracy is disclosed which assists in finding errors in a reference database by making comparisons to an interchange database. The reference and interchange databases containing first and second groups of related data strings. The data strings from the first groups are compared to find matching data strings between the reference and interchange databases. The data strings in the second groups related to the matching data strings of the first groups are then compared to verify that they match. When no matching conditions are detected, an error indication is generated.