Bulloch County election officials have replaced a letter asking certain voters to update their registration after some who received it expressed discomfort and local Democratic Party members warned it might be seen in terms of vote suppression. But officials explained the letters are part of work to create an electronic database that includes scanned voter signatures. "Dear voter," the original letter began, "Our office is in the process of updating our voter files; it has come to our attention that the application you have on file is missing one or more of the following items listed below."