diff --git a/e2e/ownership.spec.ts b/e2e/ownership.spec.ts
new file mode 100644
index 0000000..aaeb7cd
--- /dev/null
+++ b/e2e/ownership.spec.ts
@@ -0,0 +1,81 @@
+import { test, expect } from '@playwright/test';
+
+async function fetchVerifyLink(email: string): Promise<string> {
+  for (let i = 0; i < 30; i++) {
+    const res = await fetch('http://localhost:8025/api/v1/messages?limit=30');
+    const data = await res.json() as { messages: { ID: string; To: { Address: string }[] }[] };
+    const msg = data.messages.find((m) => m.To.some((t) => t.Address === email));
+    if (msg) {
+      const body = await (await fetch(`http://localhost:8025/api/v1/message/${msg.ID}`)).json() as { Text: string };
+      const m = body.Text.match(/https?:\/\/[^\s]+verify-email\?token=[^\s]+/);
+      if (m) return m[0];
+    }
+    await new Promise((r) => setTimeout(r, 250));
+  }
+  throw new Error('no verify link for ' + email);
+}
+
+async function registerAndVerify(page: import('@playwright/test').Page, name: string, email: string, password: string) {
+  await page.goto('/register');
+  await page.getByLabel(/Naam/).fill(name);
+  await page.getByLabel(/E-mailadres/).fill(email);
+  await page.getByLabel(/Wachtwoord/).fill(password);
+  await page.getByRole('button', { name: /Account aanmaken/ }).click();
+  await expect(page.getByText(/bevestigingsmail/i)).toBeVisible({ timeout: 10_000 });
+  const link = await fetchVerifyLink(email);
+  await page.goto(link);
+  await expect(page.getByRole('link', { name: 'Naar inloggen' })).toBeVisible({ timeout: 10_000 });
+}
+
+async function loginAs(page: import('@playwright/test').Page, email: string, password: string) {
+  await page.goto('/login');
+  await page.getByLabel(/E-mailadres/).fill(email);
+  await page.getByLabel(/Wachtwoord/).fill(password);
+  await page.getByRole('button', { name: 'Inloggen' }).click();
+  await expect(page.getByRole('button', { name: 'Account menu' })).toBeVisible({ timeout: 15_000 });
+}
+
+async function logout(page: import('@playwright/test').Page) {
+  await page.getByRole('button', { name: 'Account menu' }).click();
+  await page.getByRole('button', { name: 'Uitloggen' }).click();
+  await expect(page).toHaveURL(/\/login/);
+}
+
+test('user A shares lesson, B subscribes from marketplace and practices', async ({ page }) => {
+  const aEmail = `alice+${Date.now()}@example.com`;
+  const bEmail = `bob+${Date.now()}@example.com`;
+  const pw = 'secretpass';
+
+  // A registers + creates + shares lesson + adds card
+  await registerAndVerify(page, 'Alice', aEmail, pw);
+  await loginAs(page, aEmail, pw);
+  await page.goto('/admin');
+  await page.getByPlaceholder(/Nieuwe wortel-les/).fill('Spaans-test');
+  await page.getByRole('button', { name: /Toevoegen/ }).first().click();
+  await page.getByRole('link', { name: /Spaans-test/ }).first().click();
+  await page.getByPlaceholder('Nieuwe vraag').fill('hola');
+  await page.getByPlaceholder('Antwoord').fill('hello');
+  await page.getByRole('button', { name: 'Kaart toevoegen' }).click();
+  await page.getByRole('button', { name: /Deel publiek/ }).click();
+  await expect(page.getByRole('button', { name: /Maak privé/ })).toBeVisible();
+  await logout(page);
+
+  // B registers, finds in marketplace, subscribes, practices
+  await registerAndVerify(page, 'Bob', bEmail, pw);
+  await loginAs(page, bEmail, pw);
+  await page.goto('/marketplace');
+  await expect(page.getByRole('heading', { name: 'Spaans-test' })).toBeVisible({ timeout: 10_000 });
+  await page.getByRole('button', { name: 'Abonneer' }).first().click();
+
+  // Now visible in admin tree as subscribed
+  await page.goto('/admin');
+  await expect(page.getByText(/📥 Geabonneerd/).first()).toBeVisible();
+
+  // Practice it
+  await page.getByRole('link', { name: /Spaans-test/ }).first().click();
+  await page.getByRole('link', { name: /Start oefenen/ }).click();
+  await page.getByRole('button', { name: /Start sessie/ }).click();
+  await page.getByRole('button', { name: 'Toon antwoord' }).click();
+  await page.getByRole('button', { name: /Goed/ }).click();
+  await expect(page.getByText(/Sessie klaar/)).toBeVisible({ timeout: 8_000 });
+});