diff --git a/src/Bundle/ChillTicketBundle/src/Action/Ticket/SetPersonsCommand.php b/src/Bundle/ChillTicketBundle/src/Action/Ticket/SetPersonsCommand.php
index 69ba61977..aab0b968b 100644
--- a/src/Bundle/ChillTicketBundle/src/Action/Ticket/SetPersonsCommand.php
+++ b/src/Bundle/ChillTicketBundle/src/Action/Ticket/SetPersonsCommand.php
@@ -12,9 +12,11 @@ declare(strict_types=1);
 namespace Chill\TicketBundle\Action\Ticket;
 
 use Chill\PersonBundle\Entity\Person;
+use Chill\TicketBundle\Validation\Validator\SetPersonCommandConstraint;
 use Symfony\Component\Serializer\Annotation\Groups;
 use Symfony\Component\Validator\Constraints\GreaterThan;
 
+#[SetPersonCommandConstraint]
 class SetPersonsCommand
 {
     public function __construct(
diff --git a/src/Bundle/ChillTicketBundle/src/Validation/Validator/SetPersonCommandConstraint.php b/src/Bundle/ChillTicketBundle/src/Validation/Validator/SetPersonCommandConstraint.php
new file mode 100644
index 000000000..402a0d650
--- /dev/null
+++ b/src/Bundle/ChillTicketBundle/src/Validation/Validator/SetPersonCommandConstraint.php
@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\TicketBundle\Validation\Validator;
+
+use Symfony\Component\Validator\Constraint;
+
+#[\Attribute]
+class SetPersonCommandConstraint extends Constraint
+{
+    public string $notMulti = 'ticket.set_persons.Only one person can be set.';
+
+    public function getTargets(): string
+    {
+        return Constraint::CLASS_CONSTRAINT;
+    }
+}
diff --git a/src/Bundle/ChillTicketBundle/src/Validation/Validator/SetPersonCommandConstraintValidator.php b/src/Bundle/ChillTicketBundle/src/Validation/Validator/SetPersonCommandConstraintValidator.php
new file mode 100644
index 000000000..9c8b80c66
--- /dev/null
+++ b/src/Bundle/ChillTicketBundle/src/Validation/Validator/SetPersonCommandConstraintValidator.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\TicketBundle\Validation\Validator;
+
+use Chill\TicketBundle\Action\Ticket\SetPersonsCommand;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedValueException;
+
+class SetPersonCommandConstraintValidator extends ConstraintValidator
+{
+    private bool $isMulti;
+
+    public function __construct(ParameterBagInterface $parameterBag)
+    {
+        $this->isMulti = 'multi' === $parameterBag->get('chill_ticket')['ticket']['person_per_ticket'];
+    }
+
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$value instanceof SetPersonsCommand) {
+            throw new UnexpectedValueException($value, SetPersonsCommand::class);
+        }
+
+        if (!$constraint instanceof SetPersonCommandConstraint) {
+            throw new UnexpectedValueException($constraint, SetPersonCommandConstraint::class);
+        }
+
+        if (!$this->isMulti) {
+            if (1 < count($value->persons)) {
+                $this->context->buildViolation($constraint->notMulti)
+                    ->atPath('persons')
+                    ->addViolation();
+            }
+        }
+    }
+}
diff --git a/src/Bundle/ChillTicketBundle/src/config/services.yaml b/src/Bundle/ChillTicketBundle/src/config/services.yaml
index e5618284a..7e3d6050b 100644
--- a/src/Bundle/ChillTicketBundle/src/config/services.yaml
+++ b/src/Bundle/ChillTicketBundle/src/config/services.yaml
@@ -23,5 +23,8 @@ services:
     Chill\TicketBundle\Menu\:
         resource: '../Menu/'
 
+    Chill\TicketBundle\Validation\:
+        resource: '../Validation/'
+
     Chill\TicketBundle\DataFixtures\:
         resource: '../DataFixtures/'
diff --git a/src/Bundle/ChillTicketBundle/tests/Validation/Validator/SetPersonCommandConstraintValidatorTest.php b/src/Bundle/ChillTicketBundle/tests/Validation/Validator/SetPersonCommandConstraintValidatorTest.php
new file mode 100644
index 000000000..fd164354a
--- /dev/null
+++ b/src/Bundle/ChillTicketBundle/tests/Validation/Validator/SetPersonCommandConstraintValidatorTest.php
@@ -0,0 +1,90 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Validation\Validator;
+
+use Chill\PersonBundle\Entity\Person;
+use Chill\TicketBundle\Action\Ticket\SetPersonsCommand;
+use Chill\TicketBundle\Validation\Validator\SetPersonCommandConstraint;
+use Chill\TicketBundle\Validation\Validator\SetPersonCommandConstraintValidator;
+use Symfony\Component\DependencyInjection\ParameterBag\ParameterBag;
+use Symfony\Component\Validator\Test\ConstraintValidatorTestCase;
+
+/**
+ * @internal
+ *
+ * @coversNothing
+ */
+class SetPersonCommandConstraintValidatorTest extends ConstraintValidatorTestCase
+{
+    private string $personPerTicket = 'many';
+
+    protected function createValidator()
+    {
+        return new SetPersonCommandConstraintValidator(
+            new ParameterBag(['chill_ticket' => ['ticket' => ['person_per_ticket' => $this->personPerTicket]]])
+        );
+    }
+
+    /**
+     * Helper method to set the configuration and recreate the validator.
+     */
+    private function setPersonPerTicket(string $personPerTicket): void
+    {
+        $this->personPerTicket = $personPerTicket;
+        $this->validator = $this->createValidator();
+        $this->validator->initialize($this->context);
+    }
+
+    public function testValidatorWithManyPersonsPerTicket(): void
+    {
+        $this->setPersonPerTicket('multi');
+
+        $command = new SetPersonsCommand([new Person(), new Person()]);
+
+        $this->validator->validate($command, new SetPersonCommandConstraint());
+
+        $this->assertNoViolation();
+    }
+
+    public function testValidatorWithSinglePersonPerTicket(): void
+    {
+        $this->setPersonPerTicket('single');
+
+        $command = new SetPersonsCommand([new Person(), new Person()]);
+
+        $this->validator->validate($command, $command = new SetPersonCommandConstraint());
+
+        $this->buildViolation($command->notMulti)->atPath('property.path.persons')->assertRaised();
+    }
+
+    public function testValidatorWithSinglePersonPerTicketAndEmptyPersons(): void
+    {
+        $this->setPersonPerTicket('single');
+
+        $command = new SetPersonsCommand([]);
+
+        $this->validator->validate($command, new SetPersonCommandConstraint());
+
+        $this->assertNoViolation();
+    }
+
+    public function testValidatorWithSinglePersonPerTicketAndOnlyOnePerson(): void
+    {
+        $this->setPersonPerTicket('single');
+
+        $command = new SetPersonsCommand([new Person()]);
+
+        $this->validator->validate($command, new SetPersonCommandConstraint());
+
+        $this->assertNoViolation();
+    }
+}