How Salesforce Merges Duplicates

Salesforce merges duplicates better than any mainstream CRM, and the tooling is switched off by default in more orgs than you would expect.

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How Salesforce merges duplicate records

Open the record and choose merge

Contacts, accounts and leads each support merging from the record. Salesforce shows you up to three records side by side.

Choose the master and the surviving field values

The master keeps the record ID, which matters for anything referencing it. You pick the winning value field by field.

Merge, then check what moved

Related records, activities and attachments move to the master. Merges aren't reversible, and the losing record IDs are gone, so anything integrating on those IDs needs checking.

Duplicate rules and matching rules

This is the part worth setting up properly, because it works continuously rather than on cleanup day.

Matching rules define what counts as a duplicate: exact email, fuzzy name plus company, and so on. Salesforce ships standard rules you can activate.

Duplicate rules decide what happens on a match: allow with an alert, allow and report, or block outright.

Duplicate record sets and reports show what has already accumulated, so you can work through the backlog.

Alert plus report is the setting most teams should start on. Blocking outright frustrates reps and gets switched off.

Keeping it clean

Activate the standard matching rules if nobody ever did. Many orgs never have.

Apply duplicate rules to imports too, not just to manual creation, since imports are the larger source.

Give lead conversion a rule, because converting a lead when the contact already exists is a classic duplicate generator.

Review the duplicate report monthly rather than running a cleanup project once a year.

FAQ

Frequently asked questions

How do Salesforce duplicate rules relate to merging?

Salesforce duplicate management has two halves. Duplicate rules and matching rules stop or flag a duplicate as it's created, and the merge tool is what you use afterwards. To Salesforce merge contacts you still open the pair and confirm.

Can Salesforce merge duplicates automatically?

Not on its own. Duplicate rules can block or flag a duplicate as it is created, and duplicate jobs surface sets in bulk, but a person still confirms each merge. Dedupe apps on AppExchange go further.

How many records can Salesforce merge at once?

Up to three records in a single merge for the standard objects. Larger cleanups need repeated merges or a dedupe app.

Can you undo a merge in Salesforce?

No. The losing record IDs are gone, which matters for any integration keyed on them.

Do duplicate rules apply to imports?

They can, and configuring that's one of the highest-value settings in duplicate management.

Duplicate records, duplicate tickets

The same person existing twice in Salesforce usually means the same person raising two support tickets that never connect. Ticket Merger fixes that half automatically, on Zendesk and Freshdesk.

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