While identifying and removing duplicates is essential, preventing them from occurring in the first place is even better:
Double Opt-In: Implement a double opt-in process where users confirm their subscription to ensure they are added only once. Validation Scripts: Use scripts that check for duplicates during the sign-up process. Regular Updates: Keep your database updated and regularly clean your lists to minimize duplicates. Consistent Data Entry: Standardize data entry practices to reduce errors that can lead to duplicates.