diff --git a/src/core/models/invitation.py b/src/core/models/invitation.py
index d25fb39d6181cf6bf5bcab032371d5736923921f..1f5e8925ef63991ceb69325625f776d7f4af6df9 100644
--- a/src/core/models/invitation.py
+++ b/src/core/models/invitation.py
@@ -18,6 +18,10 @@ if TYPE_CHECKING:  # pragma: no cover
 
 
 class InvitationAlreadyExists(ValidationError):
+    """
+    This exception is raised when an invitation already exists between a requester and a requested entity.
+    """
+
     def __init__(self, invitation: 'Invitation') -> None:
         self.invitation = invitation
         super().__init__(
@@ -28,6 +32,10 @@ class InvitationAlreadyExists(ValidationError):
 
 
 class InvitationRejectedTimeout(ValidationError):
+    """
+    This exception is raised when an invitation has been rejected and the timeout has not yet expired.
+    """
+
     def __init__(self) -> None:
         super().__init__(
             _('Invitation__error__rejected_timeout'),
@@ -36,6 +44,16 @@ class InvitationRejectedTimeout(ValidationError):
 
 
 class RequestsState(models.TextChoices):
+    """
+    Enumeration for the state of requests.
+
+    Attributes:
+        REQUESTED: The request has been made.
+        WITHDRAWN: The request has been withdrawn.
+        ACCEPTED: The request has been accepted.
+        REJECTED: The request has been rejected.
+    """
+
     REQUESTED = 'requested', _('Invitation__requests_state-requested')
     WITHDRAWN = 'withdrawn', _('Invitation__requests_state-withdrawn')
     ACCEPTED = 'accepted', _('Invitation__requests_state-accepted')
@@ -43,12 +61,34 @@ class RequestsState(models.TextChoices):
 
 
 class InvitationType(models.TextChoices):
+    """
+    Enumeration for the type of invitations.
+
+    Attributes:
+        ASSEMBLY_MEMBER: Invitation for an Conferencemember to join an assembly.
+        TEAM_MEMBER: Invitation for an Conferencemember to join a team.
+        HABITAT: Invitation of ah Assembly for a habitat.
+    """
+
     ASSEMBLY_MEMBER = 'ASSEMBLY_MEMBER', _('Assembly Member')
     TEAM_MEMBER = 'TEAM_MEMBER', _('Team Member')
     HABITAT = 'HABITAT', _('Habitat')
 
 
 class Invitation(models.Model):
+    """
+    Model representing an invitation.
+
+    Attributes:
+        requester_type: The type of the requester (ContentType).
+        requester_id: The ID of the requester.
+        requester: The requester (GenericForeignKey).
+        requested_type: The type of the requested entity (ContentType).
+        requested_id: The ID of the requested entity.
+        requested: The requested entity (GenericForeignKey).
+        comment: A comment associated with the invitation.
+    """
+
     class Meta:
         indexes = [
             models.Index(fields=['requester_id', 'requested_id']),
@@ -108,9 +148,20 @@ class Invitation(models.Model):
 
     @classmethod
     def type_is(cls, obj: object) -> TypeIs['Invitation']:
+        """Check if the object is an Invitation.
+
+        Returns:
+            TypeIs[Invitation]: True if the object is an Invitation, False otherwise.
+        """
         return isinstance(obj, cls)
 
     def clean(self) -> None:
+        """Validation for the invitation class.
+
+        Raises:
+            InvitationAlreadyExists: Is raised when an invitation already exists between a requester and a requested entity.
+            InvitationRejectedTimeout: Is raised when an invitation has been rejected and the timeout has not yet expired.
+        """
         qs = Invitation.objects.filter(requester_id=self.requester_id, requested_id=self.requested_id).exclude(id=self.id)
         if qs.exists():
             if qs.filter(state=RequestsState.REQUESTED).exists():
@@ -123,9 +174,17 @@ class Invitation(models.Model):
                     hours=settings.INVITATION_REJECTION_DEFAULT_TIMEOUT
                 ):
                     raise InvitationRejectedTimeout
-        return super().clean()
+        super().clean()
 
     def accept(self, user: 'PlatformUser'):
+        """Accept the invitation.
+
+        Args:
+            user (PlatformUser): The user who accepts the invitation.
+
+        Raises:
+            NotImplementedError: Raied when the invitation type is not yet implemented.
+        """
         self.decision_by = user
         match self.type:
             case InvitationType.HABITAT:
@@ -134,6 +193,11 @@ class Invitation(models.Model):
                 raise NotImplementedError
 
     def accept_habitat(self):
+        """Accept the invitation for a joining a habitat.
+
+        Raises:
+            ValueError: I raised when the requested or requester type is not a habitat.
+        """
         from core.models import Assembly  # pylint: disable=import-outside-toplevel
 
         if not Assembly.type_is(self.requested):  # pragma: no cover
@@ -165,11 +229,21 @@ class Invitation(models.Model):
             )
 
     def reject(self, user: 'PlatformUser'):
+        """Reject the invitation.
+
+        Args:
+            user (PlatformUser): The user rejecting the invitation.
+        """
         self.decision_by = user
         self.state = RequestsState.REJECTED
         self.save()
 
     def withdraw(self, user: 'PlatformUser'):
+        """Withdraw the invitation.
+
+        Args:
+            user (PlatformUser): The user withdrawing the invitation.
+        """
         self.decision_by = user
         self.state = RequestsState.WITHDRAWN
         self.save()