diff --git a/src/Bundle/ChillPersonBundle/Controller/PersonDuplicateController.php b/src/Bundle/ChillPersonBundle/Controller/PersonDuplicateController.php
new file mode 100644
index 000000000..4438bde8d
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Controller/PersonDuplicateController.php
@@ -0,0 +1,141 @@
+<?php
+
+namespace Chill\PersonBundle\Controller;
+
+use Chill\PersonBundle\Entity\Person;
+use Chill\PersonBundle\Entity\PersonNotDuplicate;
+use Chill\PersonBundle\Form\PersonConfimDuplicateType;
+use Chill\PersonBundle\Repository\PersonRepository;
+use Chill\PersonBundle\Search\SimilarPersonMatcher;
+use http\Exception\InvalidArgumentException;
+use Symfony\Bundle\FrameworkBundle\Controller\Controller;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Translation\TranslatorInterface;
+
+class PersonDuplicateController extends Controller
+{
+    /**
+     * @var \Chill\PersonBundle\Search\SimilarPersonMatcher
+     */
+    private $similarPersonMatcher;
+
+    /**
+     * @var \Symfony\Component\Translation\TranslatorInterface
+     */
+    private $translator;
+
+    /**
+     * @var \Chill\PersonBundle\Repository\PersonRepository
+     */
+    private $personRepository;
+
+    public function __construct(
+      SimilarPersonMatcher $similarPersonMatcher,
+      TranslatorInterface $translator,
+      PersonRepository $personRepository
+    ) {
+        $this->similarPersonMatcher = $similarPersonMatcher;
+        $this->translator = $translator;
+        $this->personRepository = $personRepository;
+    }
+
+    public function viewAction($person_id)
+    {
+        $person = $this->_getPerson($person_id);
+        if ($person === null) {
+            throw $this->createNotFoundException("Person with id $person_id not"
+              . " found on this server");
+        }
+
+        $duplicatePersons = $this->similarPersonMatcher->matchPerson($person, 0.5);
+
+        return $this->render('ChillPersonBundle:PersonDuplicate:view.html.twig', [
+          "person" => $person,
+          'duplicatePersons' => $duplicatePersons
+        ]);
+    }
+
+    public function confirmAction($person_id, $person2_id, Request $request)
+    {
+        if ($person_id === $person2_id) {
+            throw new InvalidArgumentException('Can not merge same person');
+        }
+
+        if ($person_id > $person2_id) {
+            $tmpId = $person2_id;
+            $person2_id = $person_id;
+            $person_id = $tmpId;
+            unset($tmpId);
+        }
+
+        $person = $this->_getPerson($person_id);
+        if ($person === null) {
+            throw $this->createNotFoundException("Person with id $person_id not"
+              . " found on this server");
+        }
+
+        $person2 = $this->_getPerson($person2_id);
+        if ($person2 === null) {
+            throw $this->createNotFoundException("Person with id $person2_id not"
+              . " found on this server");
+        }
+
+        $form = $this->createForm(PersonConfimDuplicateType::class);
+
+        $form->handleRequest($request);
+
+        if ($form->isSubmitted() && $form->isValid()) {
+            dd('todo');
+        }
+
+        return $this->render('ChillPersonBundle:PersonDuplicate:confirm.html.twig', [
+            'person' => $person,
+            'person2' => $person2,
+            'form' => $form->createView(),
+        ]);
+    }
+
+    public function notDuplicateAction($person_id, $person2_id)
+    {
+        if ($person_id === $person2_id) {
+            throw new InvalidArgumentException('Can not merge same person');
+        }
+
+        if ($person_id > $person2_id) {
+            $tmpId = $person2_id;
+            $person2_id = $person_id;
+            $person_id = $tmpId;
+            unset($tmpId);
+        }
+
+        $person = $this->_getPerson($person_id);
+        if ($person === null) {
+            throw $this->createNotFoundException("Person with id $person_id not"
+              . " found on this server");
+        }
+
+        $person2 = $this->_getPerson($person2_id);
+        if ($person2 === null) {
+            throw $this->createNotFoundException("Person with id $person2_id not"
+              . " found on this server");
+        }
+
+        $personNotDuplicate = new PersonNotDuplicate();
+        $personNotDuplicate->setPerson1($person);
+        $personNotDuplicate->setPerson2($person2);
+        $personNotDuplicate->setUser($this->getUser());
+
+        $this->getDoctrine()->getManager()->persist($personNotDuplicate);
+        $this->getDoctrine()->getManager()->flush();
+
+        return $this->redirectToRoute('chill_person_duplicate_view', ['person_id' => $person->getId()]);
+    }
+
+    /**
+     * easy getting a person by his id
+     */
+    private function _getPerson($id): ?Person
+    {
+        return $this->personRepository->find($id);
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/Entity/PersonNotDuplicate.php b/src/Bundle/ChillPersonBundle/Entity/PersonNotDuplicate.php
new file mode 100644
index 000000000..e8b79698f
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Entity/PersonNotDuplicate.php
@@ -0,0 +1,107 @@
+<?php
+
+namespace Chill\PersonBundle\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+use Chill\MainBundle\Entity\User;
+
+/**
+ * PersonNotDuplicate
+ *
+ * @ORM\Table(name="chill_person_not_duplicate")
+ * @ORM\Entity()
+ */
+class PersonNotDuplicate
+{
+    /**
+     * The person's id
+     * @var integer
+     *
+     * @ORM\Id
+     * @ORM\Column(name="id", type="integer")
+     * @ORM\GeneratedValue(strategy="AUTO")
+     */
+    private $id;
+
+    /**
+     * @var Person
+     *
+     * @ORM\ManyToOne(targetEntity="Chill\PersonBundle\Entity\Person")
+     */
+    private $person1;
+
+    /**
+     * @var Person
+     *
+     * @ORM\ManyToOne(targetEntity="Chill\PersonBundle\Entity\Person")
+     */
+    private $person2;
+
+    /**
+     * @var \DateTime
+     * @ORM\Column(type="datetime")
+     */
+    private $date;
+
+    /**
+     * @var User
+     *
+     * @ORM\ManyToOne(targetEntity="Chill\MainBundle\Entity\User")
+     */
+    private $user;
+
+    public function __construct()
+    {
+        $this->date = new \DateTime();
+    }
+
+    public function getId()
+    {
+        return $this->id;
+    }
+
+    public function setId($id)
+    {
+        $this->id = $id;
+    }
+
+    public function getPerson1()
+    {
+        return $this->person1;
+    }
+
+    public function setPerson1(Person $person1)
+    {
+        $this->person1 = $person1;
+    }
+
+    public function getPerson2()
+    {
+        return $this->person2;
+    }
+
+    public function setPerson2(Person $person2)
+    {
+        $this->person2 = $person2;
+    }
+
+    public function getDate()
+    {
+        return $this->date;
+    }
+
+    public function setDate(\DateTime $date)
+    {
+        $this->date = $date;
+    }
+
+    public function getUser()
+    {
+        return $this->user;
+    }
+
+    public function setUser(User $user)
+    {
+        $this->user = $user;
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/Form/PersonConfimDuplicateType.php b/src/Bundle/ChillPersonBundle/Form/PersonConfimDuplicateType.php
new file mode 100644
index 000000000..acc385f43
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Form/PersonConfimDuplicateType.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace Chill\PersonBundle\Form;
+
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
+use Symfony\Component\Form\FormBuilderInterface;
+
+class PersonConfimDuplicateType extends AbstractType
+{
+    /**
+     * @param FormBuilderInterface $builder
+     * @param array $options
+     */
+    public function buildForm(FormBuilderInterface $builder, array $options)
+    {
+        $builder
+          ->add('confirm', CheckboxType::class, [
+            'label' => 'Je confirme la fusion de ces 2 personnes',
+            'mapped' => false,
+          ]);
+    }
+
+    /**
+     * @return string
+     */
+    public function getBlockPrefix()
+    {
+        return 'chill_personbundle_person_confirm_duplicate';
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/Menu/PersonMenuBuilder.php b/src/Bundle/ChillPersonBundle/Menu/PersonMenuBuilder.php
index 3a757d898..b39b14254 100644
--- a/src/Bundle/ChillPersonBundle/Menu/PersonMenuBuilder.php
+++ b/src/Bundle/ChillPersonBundle/Menu/PersonMenuBuilder.php
@@ -63,6 +63,16 @@ class PersonMenuBuilder implements LocalMenuBuilderInterface
             ->setExtras([
                 'order' => 50
             ]);
+
+        $menu->addChild($this->translator->trans('Person duplicate'), [
+          'route' => 'chill_person_duplicate_view',
+          'routeParameters' => [
+            'person_id' => $parameters['person']->getId()
+          ]
+        ])
+          ->setExtras([
+            'order' => 51
+          ]);
         
         if ($this->showAccompanyingPeriod === 'visible') {
             $menu->addChild($this->translator->trans('Accompanying period list'), [
diff --git a/src/Bundle/ChillPersonBundle/Resources/views/PersonDuplicate/confirm.html.twig b/src/Bundle/ChillPersonBundle/Resources/views/PersonDuplicate/confirm.html.twig
new file mode 100644
index 000000000..fcd314a62
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Resources/views/PersonDuplicate/confirm.html.twig
@@ -0,0 +1,36 @@
+{% extends "@ChillPerson/layout.html.twig"  %}
+
+{% set activeRouteKey = 'chill_person_duplicate' %}
+
+{% block title %}{{ 'Person duplicate'|trans|capitalize ~ ' ' ~ person.firstName|capitalize ~
+' ' ~ person.lastName }}{% endblock %}
+
+{% block personcontent %}
+    <h2>Ancien dossier</h2>
+    {{ person2 }}
+    <a class="sc-button bt-show" target="_blank" href="{{ path('chill_person_view', { person_id : person2.id }) }}"></a>
+
+
+    <h2>Nouveau Dossier</h2>
+    {{ person }}
+    <a class="sc-button bt-show" target="_blank" href="{{ path('chill_person_view', { person_id : person.id }) }}"></a>
+
+    {{ form_start(form) }}
+
+    {{ form_rest(form) }}
+
+    <ul class="grid-12 sticky-form-buttons record_actions ">
+        <li class="cancel">
+            <a href="{{ path('chill_person_duplicate_view',  {'person_id' : person.id}) }}" class="sc-button grey center margin-5">
+                <i class="fa fa-arrow-left"></i>
+                {{ 'Return'|trans }}
+            </a>
+        </li>
+        <li>
+            <button class="sc-button bt-save" type="submit">{{ 'Confirm'|trans }}</button>
+        </li>
+    </ul>
+
+    {{ form_end(form) }}
+
+{% endblock %}
diff --git a/src/Bundle/ChillPersonBundle/Resources/views/PersonDuplicate/view.html.twig b/src/Bundle/ChillPersonBundle/Resources/views/PersonDuplicate/view.html.twig
new file mode 100644
index 000000000..691f55e1c
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Resources/views/PersonDuplicate/view.html.twig
@@ -0,0 +1,65 @@
+{% extends "@ChillPerson/layout.html.twig"  %}
+
+{% set activeRouteKey = 'chill_person_duplicate' %}
+
+{% block title %}{{ 'Person duplicate'|trans|capitalize ~ ' ' ~ person.firstName|capitalize ~
+    ' ' ~ person.lastName }}{% endblock %}
+
+
+{% block personcontent %}
+
+<h2>{{ title|default('Person duplicate')|trans }}</h2>
+
+<table>
+    <thead>
+        <tr>
+            <th class="chill-red">{% trans %}Name{% endtrans %}</th>
+            <th class="chill-green">{% trans %}Date of birth{% endtrans %}</th>
+            <th class="chill-orange">{% trans %}Nationality{% endtrans %}</th>
+            <th>&nbsp;</th>
+        </tr>
+    </thead>
+
+{% for duplicatePerson in duplicatePersons %}
+    <tr>
+        <td>
+            {% set is_open = duplicatePerson.isOpen() %}
+            <a href="{{ path('chill_person_view', { person_id : duplicatePerson.getId }) }}" {% if chill_person.fields.accompanying_period == 'visible' %}{% if is_open %} alt="{{ 'An accompanying period is open'|trans|e('html_attr') }}"{% else %} alt="{{ 'Any accompanying periods are open'|trans|e('html_attr') }}" {% endif %}{% endif %}>
+                {{ duplicatePerson|chill_entity_render_box }}
+                {% apply spaceless %}
+                    {% if chill_person.fields.accompanying_period == 'visible' %}
+                        {% if is_open == false %}
+                            <i class="fa fa-lock" ></i>
+                        {% else %}
+                            <i class="fa fa-unlock" ></i>
+                        {% endif %}
+                    {% endif %}
+                {% endapply %}
+            </a>
+        </td>
+        <td>
+            {% if duplicatePerson.birthdate is not null %}
+                {{ duplicatePerson.birthdate|format_date('long') }}
+            {% else %}
+                {{ 'Unknown date of birth'|trans }}
+            {% endif %}
+        </td>
+        <td>
+            {% if duplicatePerson.nationality is not null %}
+                {{ duplicatePerson.nationality.name|localize_translatable_string }}
+            {% else %}
+                {{ 'Without nationality'|trans }}
+            {% endif %}
+        </td>
+        <td>
+            <ul class="record_actions">
+                <li><a class="sc-button bt-show" target="_blank" href="{{ path('chill_person_view', { person_id : duplicatePerson.id }) }}"></a></li>
+                <li><a class="sc-button bt-duplicate" href="{{ path('chill_person_duplicate_confirm', { person_id : person.id, person2_id : duplicatePerson.id }) }}"></a></li>
+                <li><a class="sc-button bt-not-duplicate" href="{{ path('chill_person_duplicate_not_duplicate', {person_id : person.id, person2_id : duplicatePerson.id}) }}"></a></li>
+            </ul>
+        </td>
+    </tr>
+{% endfor %}
+
+</table>
+{% endblock %}
diff --git a/src/Bundle/ChillPersonBundle/Search/SimilarPersonMatcher.php b/src/Bundle/ChillPersonBundle/Search/SimilarPersonMatcher.php
index ab13e607a..4b22bd656 100644
--- a/src/Bundle/ChillPersonBundle/Search/SimilarPersonMatcher.php
+++ b/src/Bundle/ChillPersonBundle/Search/SimilarPersonMatcher.php
@@ -61,35 +61,32 @@ class SimilarPersonMatcher
     }
 
     
-    public function matchPerson(Person $person)
+    public function matchPerson(Person $person, $precision = 0.15)
     {
-        $centers = $this->authorizationHelper
-            ->getReachableCenters(
-                $this->tokenStorage->getToken()->getUser(), 
-                new Role(PersonVoter::SEE)
-                );
+        $centers = $this->authorizationHelper->getReachableCenters(
+            $this->tokenStorage->getToken()->getUser(),
+            new Role(PersonVoter::SEE)
+        );
         
-        $dql = 'SELECT p from ChillPersonBundle:Person p WHERE'
-            . ' ('
-            . '     UNACCENT(LOWER(p.firstName)) LIKE UNACCENT(LOWER(:firstName)) '
-            . '     OR UNACCENT(LOWER(p.lastName)) LIKE UNACCENT(LOWER(:lastName)) '
-            . '     OR UNACCENT(LOWER(p.firstName)) LIKE UNACCENT(LOWER(:lastName)) '
-            . '     OR UNACCENT(LOWER(p.lastName)) LIKE UNACCENT(LOWER(:firstName)) '
-            . '     OR SIMILARITY(p.fullnameCanonical, UNACCENT(LOWER(:fullName))) >= 0.15 '
+        $dql = 'SELECT p from ChillPersonBundle:Person p '
+            . ' WHERE ('
+            . '   SIMILARITY(p.fullnameCanonical, UNACCENT(LOWER(:fullName))) >= :precision '
+            . '   OR SIMILARITY(p.fullnameCanonical, UNACCENT(LOWER(:fullNameInverted))) >= :precision '
             . ' ) '
             . ' AND p.center IN (:centers)'
+            . ' AND p.id != :personId'
             . ' ORDER BY SIMILARITY(p.fullnameCanonical, UNACCENT(LOWER(:fullName))) DESC '
-            ;
+        ;
         
-        $query = 
-            $this->em
+        $query = $this->em
             ->createQuery($dql)
-            ->setParameter('firstName', $person->getFirstName())
-            ->setParameter('lastName', $person->getLastName())
             ->setParameter('fullName', $person->getFirstName() . ' ' . $person->getLastName())
+            ->setParameter('fullNameInverted', $person->getLastName() . ' ' . $person->getFirstName())
             ->setParameter('centers', $centers)
-            ;
-        
+            ->setParameter('personId', $person->getId())
+            ->setParameter('precision', $precision)
+        ;
+
         return $query->getResult();
     }
 }
diff --git a/src/Bundle/ChillPersonBundle/config/routes.yaml b/src/Bundle/ChillPersonBundle/config/routes.yaml
index a9049840d..9db6ec12f 100644
--- a/src/Bundle/ChillPersonBundle/config/routes.yaml
+++ b/src/Bundle/ChillPersonBundle/config/routes.yaml
@@ -98,6 +98,10 @@ chill_person_admin_redirect_to_admin_index:
                 order: 0
                 label: Main admin menu
 
+chill_person_duplicate_view:
+    path: /{_locale}/person/{person_id}/duplicate/view
+    controller: Chill\PersonBundle\Controller\PersonDuplicateController::viewAction
+
 chill_person_closingmotive_admin:
     path:     /{_locale}/admin/closing-motive
     controller: cscrud_closing_motive_controller:index
@@ -107,6 +111,10 @@ chill_person_closingmotive_admin:
                 order: 90
                 label: 'person_admin.closing motives'
 
+chill_person_duplicate_confirm:
+    path: /{_locale}/person/{person_id}/duplicate/{person2_id}/confirm
+    controller: Chill\PersonBundle\Controller\PersonDuplicateController::confirmAction
+
 chill_person_maritalstatus_admin:
     path:     /{_locale}/admin/marital-status
     controller: cscrud_marital_status_controller:index
@@ -114,4 +122,8 @@ chill_person_maritalstatus_admin:
         menus:
             admin_person:
                 order: 120
-                label: 'person_admin.marital status'
\ No newline at end of file
+                label: 'person_admin.marital status'
+
+chill_person_duplicate_not_duplicate:
+    path: /{_locale}/person/{person_id}/duplicate/{person2_id}/not-duplicate
+    controller: Chill\PersonBundle\Controller\PersonDuplicateController::notDuplicateAction
diff --git a/src/Bundle/ChillPersonBundle/config/services/controller.yaml b/src/Bundle/ChillPersonBundle/config/services/controller.yaml
index 112d609b5..a6e446ebf 100644
--- a/src/Bundle/ChillPersonBundle/config/services/controller.yaml
+++ b/src/Bundle/ChillPersonBundle/config/services/controller.yaml
@@ -20,5 +20,12 @@ services:
         arguments:
             $eventDispatcher: '@Symfony\Component\EventDispatcher\EventDispatcherInterface'
         tags: ['controller.service_arguments']
-            
+
     Chill\PersonBundle\Controller\AdminController: ~
+
+    Chill\PersonBundle\Controller\PersonDuplicateController:
+        arguments:
+            $similarPersonMatcher: '@Chill\PersonBundle\Search\SimilarPersonMatcher'
+            $translator: '@Symfony\Component\Translation\TranslatorInterface'
+            $personRepository: '@Chill\PersonBundle\Repository\PersonRepository'
+        tags: ['controller.service_arguments']
diff --git a/src/Bundle/ChillPersonBundle/migrations/Version20210128152747.php b/src/Bundle/ChillPersonBundle/migrations/Version20210128152747.php
new file mode 100644
index 000000000..8dbcb91da
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/migrations/Version20210128152747.php
@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Application\Migrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20210128152747 extends AbstractMigration
+{
+    public function getDescription() : string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema) : void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('CREATE SEQUENCE chill_person_not_duplicate_id_seq INCREMENT BY 1 MINVALUE 1 START 1');
+        $this->addSql('CREATE TABLE chill_person_not_duplicate (id INT NOT NULL, person1_id INT DEFAULT NULL, person2_id INT DEFAULT NULL, user_id INT DEFAULT NULL, date TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL, PRIMARY KEY(id))');
+        $this->addSql('CREATE INDEX IDX_BD211EE23EF5821B ON chill_person_not_duplicate (person1_id)');
+        $this->addSql('CREATE INDEX IDX_BD211EE22C402DF5 ON chill_person_not_duplicate (person2_id)');
+        $this->addSql('CREATE INDEX IDX_BD211EE2A76ED395 ON chill_person_not_duplicate (user_id)');
+        $this->addSql('ALTER TABLE chill_person_not_duplicate ADD CONSTRAINT FK_BD211EE23EF5821B FOREIGN KEY (person1_id) REFERENCES chill_person_person (id) NOT DEFERRABLE INITIALLY IMMEDIATE');
+        $this->addSql('ALTER TABLE chill_person_not_duplicate ADD CONSTRAINT FK_BD211EE22C402DF5 FOREIGN KEY (person2_id) REFERENCES chill_person_person (id) NOT DEFERRABLE INITIALLY IMMEDIATE');
+        $this->addSql('ALTER TABLE chill_person_not_duplicate ADD CONSTRAINT FK_BD211EE2A76ED395 FOREIGN KEY (user_id) REFERENCES users (id) NOT DEFERRABLE INITIALLY IMMEDIATE');
+    }
+
+    public function down(Schema $schema) : void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('DROP SEQUENCE chill_person_not_duplicate_id_seq CASCADE');
+        $this->addSql('DROP TABLE chill_person_not_duplicate');
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/translations/messages.en.yml b/src/Bundle/ChillPersonBundle/translations/messages.en.yml
index 4c0c13d83..cd9212d5d 100644
--- a/src/Bundle/ChillPersonBundle/translations/messages.en.yml
+++ b/src/Bundle/ChillPersonBundle/translations/messages.en.yml
@@ -66,6 +66,7 @@ Reset: 'Remise à zéro'
 'Create accompanying period': 'Create accompanying period'
 'Closing motive': 'Motif de clôture'
 'Person details': 'Détails de la personne'
+'Person duplicate': 'Find duplicate'
 
 Create an accompanying period: Create an accompanying period
 'Create': Create
diff --git a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
index 08e1219e6..354625f05 100644
--- a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
+++ b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
@@ -119,6 +119,7 @@ Update accompanying period: Mettre à jour une période d'accompagnement
 "Period not opened : form is invalid": "La période n'a pas été ouverte: le formulaire est invalide."
 'Closing motive': 'Motif de clôture'
 'Person details': 'Détails de la personne'
+'Person duplicate': 'Trouver des doublons'
 'Update details for %name%': 'Modifier détails de %name%'
 Any accompanying periods are open: Aucune période d'accompagnement ouverte
 An accompanying period is open: Une période d'accompagnement est ouverte