Data quality

How should a dealership handle duplicate customer records?

Decide which system is the master for customer identity, define the matching rules explicitly, and make merging a governed process rather than something individuals do ad hoc. Duplicates are not primarily a data-cleanliness problem — they cause missed equity opportunities, repeated marketing to the same household and service history split across records.

Direct answerSeptember 1, 2026 reviewedNeutral evaluation
01

Name the master

Identity has to resolve somewhere. Usually the DMS holds the transactional truth and the CRM or CDP holds the marketing view. Whichever you choose, write it down, because unstated ownership is what produces conflicting records.

02

Define matching before buying a tool

What makes two records the same person: exact email, phone, name plus address, household? The rule set determines the results far more than the software does.

03

Merging must be reversible and logged

Merges destroy information. Require an audit trail and the ability to unpick a bad merge, and restrict who can perform one.

04

Fix the intake

Duplicates are created at write-up and lead capture. Validation at the point of entry prevents more duplicates than any periodic cleanup.

Decision checklist

What to verify

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Name the master system for customer identity

Define the matching rules before buying a tool

Require an audit trail and reversible merges

Validate at the point of entry to stop new duplicates

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