My working database contains nearly 300,000 records and one of my clients gave me their database of 40,000 records, but I know that there are many, many duplicates. I got great help the last time I did this and was able to fix a duplicate problem AFTER I imported the data. This time, I would like to get rid of the duplicates before I import them. First Name, Last Name and Company could be a good way to compare the records in both databases, but many of these people have left their companies, or I have the old information. For now, I would just like to see which names in my clients database DO NOT exist in my database and import them. Of course, this will not help with the Mikes and Michaels, or the Susans and Sues, or the misspelled names, but it's a start...