Guides

Search customers by RUC

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Lucas Cárdenas

Dec 28, 2025

Register customers

How to register a customer

Use the RUC lookup to invoice without errors.

Use the RUC lookup to invoice without errors.

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Search data by RUC

Whenever a customer requests an invoice with a RUC, the first step is to look up that RUC in the system.

This makes it possible to select from already registered customers, keep their purchase history, and, if the customer is new, automatically retrieve their tax information from the SET.

Searching by RUC saves time and avoids billing errors. A misspelled RUC or an incorrect business name can cause the invoice to be rejected by SIFEN.

Where you can search by RUC

RUC lookup is available in different parts of the platform:

  • New customer form

    When creating a customer from the Customers module.

  • Customer selection in a sale or quote

    When associating a customer during the sales process.

  • Customer editing

    To verify or compare data against the SET information.





Correct RUC format



The Paraguayan RUC has the following format:


NUMBERS – CHECK DIGIT


Valid examples:

80012345-6

4567890-2

123456-1


The hyphen is mandatory. If it is not included, the search will not work correctly.




How RUC search works



When entering a RUC and clicking Search, Focal Point performs two automatic checks:


  1. It searches your database for the RUC to check whether the customer is already registered.

  2. If it does not exist, it queries the SET database and retrieves the business name and available tax information.





Possible search results



Depending on the result, the following situations may occur:



Valid RUC



The RUC is valid and the system automatically retrieves the business name and tax information from the SET.

Review the information, complete the remaining fields, and continue with the registration.



The RUC does not appear in the SET



The RUC is not found in the SET database.

Verify that it is written correctly and, if it is correct, enter the data manually.



RUC already registered



The system detects that the RUC already exists in your system.

In this case, do not continue with the registration and use the search tool to select the existing customer.




Common issues



  • The search returns no results

    Check that the RUC includes the hyphen and check digit.

  • The retrieved data does not match the customer's data

    In some cases, the SET information may be out of date. You can adjust it manually if necessary.

  • The customer already exists but you want to create a new one

    Consider using the existing record so you do not lose history or duplicate information.





Recommendation



If you work with recurring customers, always request the RUC before invoicing.

Look it up in the system and, if it already exists, use that record. This reduces errors, keeps the full history, and speeds up the entire process.