CModule::IncludeModule("crm");
$c = new \Bitrix\Crm\Integrity\LeadDuplicateChecker();
$a = \Bitrix\Crm\EntityAdapterFactory::create();
$a->setFields(
   array(
      //'LAST_NAME' => 'Никифоров',
      //'NAME' => 'Евгений',
      //'SECOND_NAME' => 'Петрович',
      //'COMPANY_TITLE' => 'Lorem Ipsum'
      'FM' => array(
        'EMAIL' => array(array('VALUE' => 'Lorem@example.com'))
	//'PHONE' => array(array('VALUE' => '+7-555-555-55-55'))
      )
   )
);
 $p = new \Bitrix\Crm\Integrity\DuplicateCheckParams();
 $dupArry = $c->findDuplicates($a, $p);
 foreach($dupArry as $dup)
 {
   echo mydump($dup->getEntityArray());
   echo('<br/>---------<br/>');
 }

CModule::IncludeModule("crm");
 $c = new \Bitrix\Crm\Integrity\CompanyDuplicateChecker();
 $a = \Bitrix\Crm\EntityAdapterFactory::create();
 $a->setFields(
   array(
      'TITLE' => 'Young Italy Inc.'
      'FM' => array(
        'EMAIL' => array(array('VALUE' => 'youngitaly@example.com')),
	    'PHONE' => array(array('VALUE' => '+7-555-555-55-55'))
      )
   )
 );
 $p = new \Bitrix\Crm\Integrity\DuplicateCheckParams();
 $dupArry = $c->findDuplicates($a, $p);
 foreach($dupArry as $dup)
 {
   echo mydump($dup->getEntityArray());
   echo('<br/>---------<br/>');
 }

 CModule::IncludeModule("crm");
  $c = new \Bitrix\Crm\Integrity\ContactDuplicateChecker();
  $a = \Bitrix\Crm\EntityAdapterFactory::create();
  $a->setFields(
    array(
      'LAST_NAME' => 'Garibaldi',
      'NAME' => 'Giuseppe',
      'SECOND_NAME' => '',
       'FM' => array(
         'EMAIL' => array(array('VALUE' => 'garibaldi@example.com')),
 	    'PHONE' => array(array('VALUE' => '+7-555-555-55-55'))
       )
    )
  );
  $p = new \Bitrix\Crm\Integrity\DuplicateCheckParams();
  $dupArry = $c->findDuplicates($a, $p);
  foreach($dupArry as $dup)
  {
    echo mydump($dup->getEntityArray());
    echo('<br/>---------<br/>');
  }



// find duplicates by INN
Bitrix\Main\Loader::includeModule('crm');

$fields = array(
	'RQ' => array(
		'n0' => array(
			'ID' => 'n0',
			'PRESET_ID' => 1,    // If PRESET_COUNTRY_ID is set, then PRESET_ID is not required to search for duplicates
			'PRESET_COUNTRY_ID' => 1,
			'RQ_INN' => '9108116590'
		)
	)
);

$checker = new Bitrix\Crm\Integrity\CompanyDuplicateChecker();
$checker->setStrictComparison(false);
$adapter = Bitrix\Crm\EntityAdapterFactory::create($fields, \CCrmOwnerType::Company);
$dups = $checker->findDuplicates($adapter, new Bitrix\Crm\Integrity\DuplicateSearchParams());
/** @var $dup Bitrix\Crm\Integrity\Duplicate */
foreach($dups as $dup)
{
	echo mydump($dup->getEntityArray());
	echo('<br/>---------<br/>');
}

// find duplicates by account number
Bitrix\Main\Loader::includeModule('crm');

$fields = array(
	'RQ' =>	array(
		'n0' => array(
			'ID' => 'n0',
			'PRESET_ID' => 1,    // If PRESET_COUNTRY_ID is set, then PRESET_ID is not required to search for duplicates
			'PRESET_COUNTRY_ID' => 1,
			'BD' => array(
				'n0' => array(
					'ID' => 'n0',
					'ENTITY_TYPE_ID' => 8,
					'ENTITY_ID' => 'n0',
					'COUNTRY_ID' => 1,
					'RQ_ACC_NUM' => '40702810300320090107'
				)
			)
		)
	)
);

$checker = new Bitrix\Crm\Integrity\CompanyDuplicateChecker();
$checker->setStrictComparison(false);
$adapter = Bitrix\Crm\EntityAdapterFactory::create($fields, \CCrmOwnerType::Company);
$dups = $checker->findDuplicates($adapter, new Bitrix\Crm\Integrity\DuplicateSearchParams());
/** @var $dup Bitrix\Crm\Integrity\Duplicate */
foreach($dups as $dup)
{
	echo mydump($dup->getEntityArray());
	echo('<br/>---------<br/>');
}

// find duplicates by INN or account number
Bitrix\Main\Loader::includeModule('crm');

$fields = array(
	'RQ' =>	array(
		'n0' => array(
			'ID' => 'n0',
			'PRESET_ID' => 1,    // If PRESET_COUNTRY_ID is set, then PRESET_ID is not required to search for duplicates
			'PRESET_COUNTRY_ID' => 1,
			'RQ_INN' => '9108116590',    // INN
			'BD' => array(
				'n0' => array(
					'ID' => 'n0',
					'ENTITY_TYPE_ID' => 8,
					'ENTITY_ID' => 'n0',
					'COUNTRY_ID' => 1,
					'RQ_ACC_NUM' => '40702810300320090107'    // account number
				)
			)
		)
	)
);

$checker = new Bitrix\Crm\Integrity\CompanyDuplicateChecker();
$checker->setStrictComparison(false);
$adapter = Bitrix\Crm\EntityAdapterFactory::create($fields, \CCrmOwnerType::Company);
$dups = $checker->findDuplicates($adapter, new Bitrix\Crm\Integrity\DuplicateSearchParams());
/** @var $dup Bitrix\Crm\Integrity\Duplicate */
foreach($dups as $dup)
{
	echo mydump($dup->getEntityArray());
	echo('<br/>---------<br/>');
}