diff --git a/pyproject.toml b/pyproject.toml
index 7ebb19b..a5431e3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -141,14 +141,19 @@ ignore = [
     "EM102", # Exception must not use a f-string literal, assign to variable first
     "COM812", # missing-trailing-comma (https://docs.astral.sh/ruff/formatter/#conflicting-lint-rules)
     "ISC001", # single-line-implicit-string-concatenation (https://docs.astral.sh/ruff/formatter/#conflicting-lint-rules)
+    "D100", # Missing docstring in public module
+    "D101", # Missing docstring in public class
+    "D102", # Missing docstring in public method
     "D105", # Missing docstring in magic method
     "D106", # Missing docstring in public nested class
+    "D107", # Missing docstring in `__init__`
     "FIX", # TODO, FIXME, XXX
     "TD", # TODO, FIXME, XXX
     "ANN002", # Missing type annotation for `*args`
     "ANN003", # Missing type annotation for `**kwargs`
-    "FBT001", # Misbehaves: Complains about positional arguments that are keyworded.
-    "FBT002", # Misbehaves: Complains about positional arguments that are keyworded.
+    "FBT001", # Misbehaves: Boolean-typed positional argument in function definition
+    "FBT002", # Misbehaves: Boolean-typed positional argument in function definition
+    "TRY003", # Avoid specifying long messages outside the exception class
 ]
 
 [tool.ruff.lint.isort]
diff --git a/src/membership/emails.py b/src/membership/emails.py
index 20a243a..486108a 100644
--- a/src/membership/emails.py
+++ b/src/membership/emails.py
@@ -6,6 +6,7 @@
 """
 
 from django.contrib import messages
+from django.contrib.auth.tokens import default_token_generator
 from django.contrib.sites.shortcuts import get_current_site
 from django.core.mail.message import EmailMessage
 from django.http import HttpRequest
@@ -13,11 +14,15 @@ from django.template import loader
 from django.utils import translation
 from django.utils.translation import gettext_lazy as _
 
+from src.membership.models import Membership
+
 
 class BaseEmail(EmailMessage):
     """Send emails via templated body and subjects.
 
     This base class is extended for all email functionality.
+    Because all emails are sent to the Member object, we can keep them gathered here, even when they are generated by
+    other apps (like the accounting app).
     """
 
     template = "membership/email/base.txt"
@@ -25,7 +30,7 @@ class BaseEmail(EmailMessage):
     template_subject = None
     default_subject = "SET SUBJECT HERE"
 
-    def __init__(self, request: HttpRequest, *args, **kwargs) -> None:  # noqa: D107
+    def __init__(self, request: HttpRequest, *args, **kwargs) -> None:
         self.context = kwargs.pop("context", {})
         self.user = kwargs.pop("user", None)
         if self.user:
@@ -76,7 +81,7 @@ class BaseEmail(EmailMessage):
             subject = str(self.default_subject)
         return subject
 
-    def send_with_feedback(self, success_msg: str | None = None, no_message: bool = False) -> None:
+    def send_with_feedback(self, *, success_msg: str | None = None, no_message: bool = False) -> None:
         """Send email, possibly adding feedback via django.contrib.messages."""
         if not success_msg:
             success_msg = _("Email successfully sent to {}").format(", ".join(self.to))
@@ -86,3 +91,20 @@ class BaseEmail(EmailMessage):
                 messages.success(self.request, success_msg)
         except RuntimeError:
             messages.error(self.request, _("Not sent, something wrong with the mail server."))
+
+
+class InviteEmail(BaseEmail):
+    template = "membership/emails/invite.txt"
+    default_subject = _("Invite to data.coop membership")
+
+    def __init__(self, membership: Membership, request: HttpRequest, *args, **kwargs) -> None:
+        self.membership = membership
+        kwargs["user"] = membership.user
+        super().__init__(request, *args, **kwargs)
+
+    def get_context_data(self) -> dict:
+        c = super().get_context_data()
+        c["membership"] = self.membership
+        c["token"] = default_token_generator.make_token(self.membership.user)
+        c["referral_code"] = self.membership.referral_code
+        return c
diff --git a/src/membership/forms.py b/src/membership/forms.py
new file mode 100644
index 0000000..23b8b2e
--- /dev/null
+++ b/src/membership/forms.py
@@ -0,0 +1,19 @@
+from allauth.account.forms import SetPasswordForm
+
+
+class CreatePasswordForm(SetPasswordForm):
+    """Create a new password for a user account that is created through an invite."""
+
+    def __init__(self, *args, **kwargs) -> None:
+        self.membership = kwargs.pop("membership")
+        super().__init__(*args, **kwargs)
+
+    def save(self) -> None:
+        """Save instance to db.
+
+        Note: You can hack a re-activation of a deactivated account
+        by getting a valid token before deactivation (from the reset password form).
+        We can block this by also setting Membership.revoked=False when deactivating someone's account.
+        """
+        self.user.is_active = True
+        super().save()
diff --git a/src/membership/migrations/0009_membership_referral_code.py b/src/membership/migrations/0009_membership_referral_code.py
new file mode 100644
index 0000000..f8c0e07
--- /dev/null
+++ b/src/membership/migrations/0009_membership_referral_code.py
@@ -0,0 +1,32 @@
+# Generated by Django 5.1rc1 on 2024-08-07 22:32
+
+import uuid
+from django.db import migrations, models
+
+
+def create_uuid(apps, schema_editor):
+    Membership = apps.get_model('membership', 'Membership')
+    for membership in Membership.objects.all():
+        membership.referral_code = uuid.uuid4()
+        membership.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('membership', '0008_alter_membership_membership_type'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='membership',
+            name='referral_code',
+            field=models.UUIDField(blank=True, null=True, unique=True, default=uuid.uuid4, editable=False),
+        ),
+        migrations.RunPython(create_uuid),
+        migrations.AddField(
+            model_name='membership',
+            name='referral_code',
+            field=models.UUIDField(unique=True, default=uuid.uuid4, editable=False),
+        ),
+    ]
diff --git a/src/membership/models.py b/src/membership/models.py
index 9483d0f..fca8c74 100644
--- a/src/membership/models.py
+++ b/src/membership/models.py
@@ -1,5 +1,6 @@
 """Models for the membership app."""
 
+import uuid
 from typing import ClassVar
 from typing import Self
 
@@ -122,6 +123,9 @@ class Membership(CreatedModifiedAbstract):
 
     user = models.ForeignKey("auth.User", on_delete=models.PROTECT, related_name="memberships")
 
+    # This code is used for inviting a user to create an account for this membership.
+    referral_code = models.UUIDField(unique=True, default=uuid.uuid4, editable=False)
+
     membership_type = models.ForeignKey(
         "membership.MembershipType",
         related_name="memberships",
diff --git a/src/membership/templates/membership/emails/invitation.txt b/src/membership/templates/membership/emails/invite.txt
similarity index 100%
rename from src/membership/templates/membership/emails/invitation.txt
rename to src/membership/templates/membership/emails/invite.txt
diff --git a/src/membership/templates/membership/invite.html b/src/membership/templates/membership/invite.html
new file mode 100644
index 0000000..d9cbce0
--- /dev/null
+++ b/src/membership/templates/membership/invite.html
@@ -0,0 +1,14 @@
+{% extends "base.html" %}
+{% load i18n %}
+
+{% block head_title %}
+    {% trans "Membership" %}
+{% endblock %}
+
+{% block content %}
+
+    <div class="content-view">
+        <h2>Membership invite</h2>
+
+    </div>
+{% endblock %}
diff --git a/src/membership/views.py b/src/membership/views.py
index 0c5ebf9..3331844 100644
--- a/src/membership/views.py
+++ b/src/membership/views.py
@@ -4,6 +4,11 @@ from __future__ import annotations
 
 from typing import TYPE_CHECKING
 
+from django.contrib import messages
+from django.contrib.auth.tokens import default_token_generator
+from django.http import HttpResponseNotAllowed
+from django.shortcuts import get_object_or_404
+from django.shortcuts import redirect
 from django.utils.translation import gettext_lazy as _
 from django_ratelimit.decorators import ratelimit
 from django_view_decorator import namespaced_decorator_factory
@@ -11,6 +16,8 @@ from utils.view_utils import RenderConfig
 from utils.view_utils import RowAction
 from utils.view_utils import render
 
+from .forms import CreatePasswordForm
+from .models import Membership
 from .permissions import ADMINISTRATE_MEMBERS
 from .selectors import get_member
 from .selectors import get_members
@@ -118,11 +125,11 @@ def members_admin_detail(request: HttpRequest, member_id: int) -> HttpResponse:
 
 @ratelimit(group="membership", key="ip", rate="10/d", method="ALL", block=True)
 @member_view(
-    paths="invite/<str:token>/",
+    paths="invite/<str:membership_code>/<str:token>/",
     name="membership-invite",
     login_required=False,
 )
-def invite(request: HttpRequest, token: str) -> HttpResponse:
+def invite(request: HttpRequest, referral_code: str, token: str) -> HttpResponse:
     """View to invite a member to create a membership.
 
     The token belongs to a non-active Member object. If the token is valid,
@@ -130,8 +137,26 @@ def invite(request: HttpRequest, token: str) -> HttpResponse:
 
     We ratelimit this view so it's not possible to brute-force tokens.
     """
+    # Firstly, we get the membership by the referral code.
+    membership = get_object_or_404(Membership, referral_code=referral_code, user__is_active=False, revoked=False)
+
+    token_valid = default_token_generator.check_token(membership.user, token)
+
+    if not token_valid:
+        raise HttpResponseNotAllowed("Token not valid - maybe it expired?")
+
+    if request.method == "POST":
+        form = CreatePasswordForm(membership=membership, user=membership, data=request.POST)
+        if form.is_valid():
+            messages.info(request, _("Password is set for your account and you can now login."))
+            return redirect("account_login")
+    else:
+        form = CreatePasswordForm(user=membership)
+
     context = {
         "token": token,
+        "membership": membership,
+        "form": form,
     }
     return render(
         request=request,
diff --git a/src/project/settings.py b/src/project/settings.py
index 4f558a1..d6a800c 100644
--- a/src/project/settings.py
+++ b/src/project/settings.py
@@ -182,6 +182,10 @@ LOGGING = {
 STRIPE_API_KEY = env.str("STRIPE_API_KEY")
 STRIPE_ENDPOINT_SECRET = env.str("STRIPE_ENDPOINT_SECRET")
 
+# The number of seconds a password reset link is valid for (default: 3 days).
+# We've extended this to 7 days because invites then last for 1 week.
+PASSWORD_RESET_TIMEOUT = 60 * 60 * 24 * 7
+
 if DEBUG:
     INSTALLED_APPS += ["debug_toolbar", "django_browser_reload"]
     MIDDLEWARE += [