What steps should be taken to avoid duplicate information entry on both Opportunity and Payment records?

Creating Payment Mappings in NPSP Settings is the most effective step to avoid duplicate information entry on both Opportunity and Payment records. Payment Mappings allow for the configuration of how payment data corresponds to opportunities in the Nonprofit Success Pack (NPSP). By establishing these relationships and rules, the system can automate data entry processes, ensuring that information is accurately linked between Opportunities and Payments without requiring repetitive manual input.

Utilizing Payment Mappings minimizes the risk of human error and data redundancy since it provides a structured approach for managing how payments are associated with their respective opportunities. This configuration helps maintain data integrity and streamlines workflow, making it easier for users to track payments alongside opportunities without confusion or duplication of entry.

The other options, while they could potentially contribute to data management in some way, do not specifically address the issue of avoiding duplicates in the same comprehensive manner as utilizing Payment Mappings. Custom fields and lookup fields could provide additional categorization or reference points, but they do not inherently prevent duplicate entries. Creating a workflow to copy payment information might also lead to duplication if not managed carefully since it implies duplicating existing data instead of providing a preventative measure.