Validate any RNC with the DGII

A simple package to check a given RNC with the official Tax Authority, Dirección General de Impuestos Internos (DGII), in the Dominican Republic and few more options.

Requirements

• PHP >= 8.1

Installation

You can install the package via composer:

composer require seisigmasrl/dgii-rnc-validator

Usage

This package aims to bring you a simple way to check and validate if a given RNC is valid and its current status with the tax authorities. Most existing solutions are based on parsing a monthly shared file with all the existing RNC by the Dirección General de Impuestos Internos (DGII), the official Tax Authority in the Dominican Republic.

This approach is excellent for improving performance, but it's not optimal for services requiring live, trusted information. For this reason, the current package provides a simple API to:

• Validate RNC's
• Verify if the given RNC is valid.

The package fetches data directly from the official DGII web portal to ensure you always get up-to-date information.

Here's the list of the provided methods by this package:

Check

Validate if a given RNC is valid and returns the details of the Taxpayer, or false if not found.
How to use it:

use Seisigma\DgiiRncValidator\DgiiRncValidator;

// 132620951 is a valid RNC
$validatedRnc = DgiiRncValidator::check("132620951");
var_dump($validatedRnc);

// array(4) {
//    ["rnc"]=> string(9) "132620951"
//    ["name"]=> string(29) "KOI CORPORATION BY SAIKOV SRL"
//    ["commercial_name"]=> string(25) "KOI CORPORATION BY SAIKOV"
//    ["status"]=> string(6) "ACTIVO"
// }

// 123456789 is not registered in DGII
$validatedRnc = DgiiRncValidator::check("123456789");
var_dump($validatedRnc); // bool(false)

validateRNC

Validate if a given string has a valid RNC format (9 digits) or Cedula format (11 digits).
How to use it:

use Seisigma\DgiiRncValidator\DgiiRncValidator;

$validatedRnc = DgiiRncValidator::validateRNC("132620951");
var_dump($validatedRnc); // bool(true) - valid 9-digit RNC format

$validatedRnc = DgiiRncValidator::validateRNC("12345678901");
var_dump($validatedRnc); // bool(true) - valid 11-digit Cedula format

$validatedRnc = DgiiRncValidator::validateRNC("12345");
var_dump($validatedRnc); // bool(false) - invalid format

rncType

Returns the type of identifier (RNC or Cedula) based on the string length.
How to use it:

use Seisigma\DgiiRncValidator\DgiiRncValidator;
use Seisigma\DgiiRncValidator\helpers\Types;

// 9-digit identifier = RNC (business)
$rncType = DgiiRncValidator::rncType("132620951");
var_dump($rncType); // enum(Types::RNC)

// 11-digit identifier = Cedula (person)
$rncType = DgiiRncValidator::rncType("04800009577");
var_dump($rncType); // enum(Types::CEDULA)

// Invalid format returns false
$rncType = DgiiRncValidator::rncType("12345");
var_dump($rncType); // bool(false)

The Types enum includes two functions:

• toString: Return the string value from the returned enum. Ex:

var_dump(Types::RNC->toString()) // string(RNC)

• toCode: Return the DGII type code value from the returned enum. Ex:

var_dump(Types::RNC->toCode()) // string(01)

Status Enum

The check() method returns the taxpayer status as a normalized string. You can also use the Status enum directly to work with status values.

use Seisigma\DgiiRncValidator\helpers\Status;

// Convert a string to Status enum
$status = Status::fromString("ACTIVO");
var_dump($status); // enum(Status::ACTIVE)

// Get the string representation
var_dump(Status::ACTIVE->toString()); // string(6) "ACTIVO"

Available status values:

Enum	String Value	Description
Status::ACTIVE	ACTIVO	Active taxpayer
Status::INACTIVE	INACTIVO	Inactive taxpayer
Status::SUSPENSE	SUSPENDIDO	Suspended taxpayer
Status::DECOMMISSIONED	DADO DE BAJA	Decommissioned taxpayer

Helper Functions

Just in case you need a few extra tools, here's a list of utility functions:

getNumbers

This function returns all numbers from any provided string.
How to use it:

use Seisigma\DgiiRncValidator\helpers\Utils;

$results = Utils::getNumbers("abc123456");
var_dump($results); // string(6) "123456"

$results = Utils::getNumbers("asdfasdfs");
var_dump($results); // bool(false)

luhnAlgorithmValidation

This function validates if the given sequence of digits has a valid key (checksum).
How to use it:

use Seisigma\DgiiRncValidator\helpers\Utils;

$result = Utils::luhnAlgorithmValidation("79927398713");
var_dump($result); // bool(true)

$result = Utils::luhnAlgorithmValidation("79927398715");
var_dump($result); // bool(false)

validateDominicanCitizenId

This function validates if the given sequence of digits is a valid Dominican Citizen Id.
How to use it:

use Seisigma\DgiiRncValidator\helpers\Utils;

$result = Utils::validateDominicanCitizenId("04800009575");
var_dump($result); // bool(true)

$result = Utils::validateDominicanCitizenId("04800009577");
var_dump($result); // bool(false)

Exception Handling

The check() method may throw exceptions when there are issues connecting to the DGII service:

use Seisigma\DgiiRncValidator\DgiiRncValidator;
use Seisigma\DgiiRncValidator\Exceptions\DgiiServiceException;

try {
    $result = DgiiRncValidator::check("132620951");
} catch (InvalidArgumentException $e) {
    // Invalid RNC format provided
} catch (DgiiServiceException $e) {
    // Service-related error (connection failed, access denied, timeout, etc.)
    echo $e->getMessage();
}

The DgiiServiceException is thrown in the following scenarios:

• Connection failed: Unable to connect to DGII service
• Access denied: Request was blocked by DGII (403 error)
• Invalid page structure: The DGII website structure has changed
• Timeout: Request to DGII service timed out

Testing

composer test

Changelog

Please see CHANGELOG for more information on what has changed recently.

Contributing

Please see CONTRIBUTING for details.

Security Vulnerabilities

Please review our security policy on how to report security vulnerabilities.

Credits

• Ricardo A. Vargas R.
• All Contributors

License

The MIT License (MIT). Please see License File for more information.