Merge Customers This utility allows you to merge customers. When somebody has duplicated a customer and has put transactions against it, you can merge the transactions of the customer to the new customer. Once you have completed the merge, it is recommended thank you delete the duplicated customer.   Source Customer  Find the customer that is duplicated, enter the customer in this section. This will be the customer that you will delete after you have merged it. Merge to customer This is the customer that you want as the main customer. Enter both the source and the merge to customer and then click on confirm to reassign all customer transactions.