Duplicate Account or Contact Records in a Salesforce Report That Contains Territory Fields

In Salesforce CRM, reports may display duplicate Account or Contact records when the report includes a Territory field as a column, grouping, or filter. This behavior occurs because Standard Report Types and Custom Report Types handle Territory fields differently.
For example, in a standard "Contacts and Accounts" report:

• If no Territory field is used as a column, grouping, or report filter, the report behaves as Contacts with Accounts — each record appears once.
• If at least one Territory field is selected, the report behaves as Contacts with Accounts and Territories — and any Account or Contact assigned to two different Territories, or assigned to the same Territory for different reasons, is returned once per Territory assignment.

As a result, a single Account or Contact record may appear multiple times in the report output.