To prevent the creation of duplicate records from online form submissions in NetSuite, two key preferences can be utilized:

On the Select Fields tab, select the Search column field: By enabling the Search column for specific fields on the Select Fields tab, the system can perform searches based on the data entered in those fields to check for existing records that match the criteria. This helps prevent duplicates by comparing incoming form data against existing records.

On the Setup Workflow tab, select Use Duplicate Detection Criteria: This setting activates duplicate detection rules that you have defined for your system or specific record type. When this preference is set, the system uses these predefined criteria to identify and prevent duplication during the form submission process.

Both of these settings are crucial for maintaining data integrity and preventing the accumulation of redundant records in the database.

References:

NetSuite Online Form Configuration Guide.

Best practices in managing duplicate records in NetSuite.