diff --git a/frontend/src/__tests__/GuestCheckoutPage.spec.ts b/frontend/src/__tests__/GuestCheckoutPage.spec.ts
new file mode 100644
index 0000000..0bce7d2
--- /dev/null
+++ b/frontend/src/__tests__/GuestCheckoutPage.spec.ts
@@ -0,0 +1,185 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest'
+import { mount } from '@vue/test-utils'
+import { createPinia, setActivePinia } from 'pinia'
+import { createRouter, createMemoryHistory } from 'vue-router'
+
+const mocks = vi.hoisted(() => ({
+  mockCreateGuestOrder: vi.fn(),
+}))
+
+vi.mock('@/api/guestOrders', () => ({
+  createGuestOrder: mocks.mockCreateGuestOrder,
+}))
+
+import GuestCheckoutPage from '@/pages/GuestCheckoutPage.vue'
+import { createGuestOrder } from '@/api/guestOrders'
+const mockCreateGuestOrder = vi.mocked(createGuestOrder)
+
+function createTestRouter() {
+  return createRouter({
+    history: createMemoryHistory(),
+    routes: [
+      { path: '/', name: 'home', component: { template: '<div>Home</div>' } },
+      {
+        path: '/gast-kassa',
+        name: 'guest-checkout',
+        component: GuestCheckoutPage,
+      },
+      {
+        path: '/gast-betalning/:orderId',
+        name: 'guest-payment',
+        component: { template: '<div>Payment</div>' },
+      },
+      {
+        path: '/logga-in',
+        name: 'login',
+        component: { template: '<div>Login</div>' },
+      },
+    ],
+  })
+}
+
+async function mountPage() {
+  const pinia = createPinia()
+  setActivePinia(pinia)
+  const router = createTestRouter()
+  await router.push({ name: 'guest-checkout' })
+  await router.isReady()
+
+  const wrapper = mount(GuestCheckoutPage, {
+    global: { plugins: [router, pinia] },
+  })
+
+  return { wrapper, router }
+}
+
+describe('GuestCheckoutPage', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+  })
+
+  it('renders heading and price', async () => {
+    const { wrapper } = await mountPage()
+    expect(wrapper.text()).toContain('Skicka ett brev')
+    expect(wrapper.text()).toContain('49 kr')
+    expect(wrapper.text()).toContain('Inget konto behövs')
+  })
+
+  it('disables submit button when fields are empty', async () => {
+    const { wrapper } = await mountPage()
+    const submit = wrapper.find('.guest-checkout__submit')
+    expect(submit.attributes('disabled')).toBeDefined()
+  })
+
+  it('enables submit button when plate, letter, and email are valid', async () => {
+    const { wrapper } = await mountPage()
+    const inputs = wrapper.findAll('input')
+    const textarea = wrapper.find('textarea')
+
+    await inputs[0].setValue('ABC123')
+    await textarea.setValue('Hej, din bil står fel!')
+    await inputs[1].setValue('test@example.se')
+
+    const submit = wrapper.find('.guest-checkout__submit')
+    expect(submit.attributes('disabled')).toBeUndefined()
+  })
+
+  it('keeps submit disabled with an invalid plate', async () => {
+    const { wrapper } = await mountPage()
+    const inputs = wrapper.findAll('input')
+    const textarea = wrapper.find('textarea')
+
+    await inputs[0].setValue('ABC') // too short
+    await textarea.setValue('Hej')
+    await inputs[1].setValue('test@example.se')
+
+    const submit = wrapper.find('.guest-checkout__submit')
+    expect(submit.attributes('disabled')).toBeDefined()
+  })
+
+  it('keeps submit disabled with an invalid email', async () => {
+    const { wrapper } = await mountPage()
+    const inputs = wrapper.findAll('input')
+    const textarea = wrapper.find('textarea')
+
+    await inputs[0].setValue('ABC123')
+    await textarea.setValue('Hej')
+    await inputs[1].setValue('not-an-email')
+
+    const submit = wrapper.find('.guest-checkout__submit')
+    expect(submit.attributes('disabled')).toBeDefined()
+  })
+
+  it('shows character count that updates with input', async () => {
+    const { wrapper } = await mountPage()
+    const textarea = wrapper.find('textarea')
+
+    await textarea.setValue('Hej')
+
+    expect(wrapper.text()).toContain('3 / 1000 tecken')
+  })
+
+  it('shows link to login page', async () => {
+    const { wrapper } = await mountPage()
+    expect(wrapper.text()).toContain('Har du redan ett konto?')
+    expect(wrapper.text()).toContain('Logga in')
+  })
+
+  it('calls createGuestOrder and navigates on submit', async () => {
+    mockCreateGuestOrder.mockResolvedValue({
+      id: 'order-123',
+      plate: 'ABC123',
+      letterText: 'Hej',
+      status: 'pending_payment',
+      trackingId: null,
+      amountPaid: null,
+      createdAt: '2025-01-01T00:00:00Z',
+      guestToken: 'token-abc',
+    })
+
+    const { wrapper, router } = await mountPage()
+    const inputs = wrapper.findAll('input')
+    const textarea = wrapper.find('textarea')
+
+    await inputs[0].setValue('ABC123')
+    await textarea.setValue('Hej, din bil står fel!')
+    await inputs[1].setValue('test@example.se')
+
+    await wrapper.find('form').trigger('submit.prevent')
+
+    await vi.waitFor(() => {
+      expect(mockCreateGuestOrder).toHaveBeenCalledWith(
+        'ABC123',
+        'Hej, din bil står fel!',
+        'test@example.se',
+      )
+    })
+
+    await vi.waitFor(() => {
+      expect(router.currentRoute.value.name).toBe('guest-payment')
+      expect(router.currentRoute.value.params.orderId).toBe('order-123')
+      expect(router.currentRoute.value.query.token).toBe('token-abc')
+      expect(router.currentRoute.value.query.plate).toBe('ABC123')
+    })
+  })
+
+  it('shows error message when order creation fails', async () => {
+    mockCreateGuestOrder.mockRejectedValue(new Error('Network error'))
+
+    const { wrapper } = await mountPage()
+    const inputs = wrapper.findAll('input')
+    const textarea = wrapper.find('textarea')
+
+    await inputs[0].setValue('ABC123')
+    await textarea.setValue('Hej')
+    await inputs[1].setValue('test@example.se')
+
+    await wrapper.find('form').trigger('submit.prevent')
+
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain(
+        'Kunde inte skapa beställningen. Försök igen senare.',
+      )
+    })
+  })
+})
diff --git a/frontend/src/__tests__/GuestOrderPage.spec.ts b/frontend/src/__tests__/GuestOrderPage.spec.ts
new file mode 100644
index 0000000..d5f62b6
--- /dev/null
+++ b/frontend/src/__tests__/GuestOrderPage.spec.ts
@@ -0,0 +1,191 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest'
+import { mount } from '@vue/test-utils'
+import { createPinia, setActivePinia } from 'pinia'
+import { createRouter, createMemoryHistory } from 'vue-router'
+
+const mocks = vi.hoisted(() => ({
+  mockFetchGuestOrder: vi.fn(),
+}))
+
+vi.mock('@/api/guestOrders', () => ({
+  fetchGuestOrder: mocks.mockFetchGuestOrder,
+}))
+
+import GuestOrderPage from '@/pages/GuestOrderPage.vue'
+
+const mockOrder = {
+  id: 'order-123',
+  plate: 'ABC123',
+  letterText: 'Hej, din bil står fel!',
+  status: 'pending_payment',
+  trackingId: null,
+  amountPaid: null,
+  createdAt: '2025-01-01T12:00:00Z',
+  guestToken: 'token-abc',
+}
+
+function createTestRouter() {
+  return createRouter({
+    history: createMemoryHistory(),
+    routes: [
+      { path: '/', name: 'home', component: { template: '<div>Home</div>' } },
+      {
+        path: '/gast-order/:token',
+        name: 'guest-order',
+        component: GuestOrderPage,
+      },
+      {
+        path: '/gast-betalning/:orderId',
+        name: 'guest-payment',
+        component: { template: '<div>Payment</div>' },
+      },
+    ],
+  })
+}
+
+async function mountPage(token = 'token-abc') {
+  const pinia = createPinia()
+  setActivePinia(pinia)
+  const router = createTestRouter()
+  await router.push({ name: 'guest-order', params: { token } })
+  await router.isReady()
+
+  const wrapper = mount(GuestOrderPage, {
+    global: { plugins: [router, pinia] },
+  })
+
+  return { wrapper, router }
+}
+
+describe('GuestOrderPage', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    mocks.mockFetchGuestOrder.mockResolvedValue(mockOrder)
+  })
+
+  it('shows loading state initially', async () => {
+    // Never resolve so we can see the loading state
+    mocks.mockFetchGuestOrder.mockReturnValue(new Promise(() => {}))
+
+    const { wrapper } = await mountPage()
+    expect(wrapper.text()).toContain('Laddar')
+  })
+
+  it('renders order details after loading', async () => {
+    const { wrapper } = await mountPage()
+
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Din beställning')
+    })
+
+    expect(wrapper.text()).toContain('ABC123')
+    expect(wrapper.text()).toContain('order-123')
+    expect(wrapper.text()).toContain('Hej, din bil står fel!')
+  })
+
+  it('displays human-readable status labels', async () => {
+    mocks.mockFetchGuestOrder.mockResolvedValue({
+      ...mockOrder,
+      status: 'pending_payment',
+    })
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Väntar på betalning')
+    })
+  })
+
+  it('shows "Behandlas" for paid status', async () => {
+    mocks.mockFetchGuestOrder.mockResolvedValue({
+      ...mockOrder,
+      status: 'paid',
+    })
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Behandlas')
+    })
+  })
+
+  it('shows "Skickat" for sent status', async () => {
+    mocks.mockFetchGuestOrder.mockResolvedValue({
+      ...mockOrder,
+      status: 'sent',
+    })
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Skickat')
+    })
+  })
+
+  it('shows "Levererat" for delivered status', async () => {
+    mocks.mockFetchGuestOrder.mockResolvedValue({
+      ...mockOrder,
+      status: 'delivered',
+    })
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Levererat')
+    })
+  })
+
+  it('shows "Misslyckades" for failed status', async () => {
+    mocks.mockFetchGuestOrder.mockResolvedValue({
+      ...mockOrder,
+      status: 'failed',
+    })
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Misslyckades')
+    })
+  })
+
+  it('shows "Avbrutet" for cancelled status', async () => {
+    mocks.mockFetchGuestOrder.mockResolvedValue({
+      ...mockOrder,
+      status: 'cancelled',
+    })
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Avbrutet')
+    })
+  })
+
+  it('shows payment link when status is pending_payment', async () => {
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Gå till betalningssidan')
+    })
+  })
+
+  it('hides payment link when order is not pending_payment', async () => {
+    mocks.mockFetchGuestOrder.mockResolvedValue({
+      ...mockOrder,
+      status: 'sent',
+    })
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).not.toContain('Gå till betalningssidan')
+    })
+  })
+
+  it('shows error when fetch fails', async () => {
+    mocks.mockFetchGuestOrder.mockRejectedValue(new Error('Not found'))
+
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain(
+        'Kunde inte hitta beställningen. Kontrollera länken.',
+      )
+    })
+  })
+
+  it('does not fetch order when token is missing in params', async () => {
+    // The component guards against an empty token in onMounted.
+    // Vue Router requires the :token param so we simulate by checking
+    // that fetchGuestOrder is only called once per mount with a token.
+    const { wrapper } = await mountPage('token-abc')
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Din beställning')
+    })
+    expect(mocks.mockFetchGuestOrder).toHaveBeenCalledTimes(1)
+  })
+})
diff --git a/frontend/src/__tests__/GuestPaymentRedirect.spec.ts b/frontend/src/__tests__/GuestPaymentRedirect.spec.ts
new file mode 100644
index 0000000..7e31b4b
--- /dev/null
+++ b/frontend/src/__tests__/GuestPaymentRedirect.spec.ts
@@ -0,0 +1,307 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest'
+import { mount } from '@vue/test-utils'
+import { createPinia, setActivePinia } from 'pinia'
+import { createRouter, createMemoryHistory } from 'vue-router'
+
+const mocks = vi.hoisted(() => ({
+  mockFetchGuestOrder: vi.fn(),
+  mockPayGuestOrder: vi.fn(),
+  mockFetchSwishInfo: vi.fn(),
+  mockBuildSwishPaymentUrl: vi.fn(),
+  mockToDataURL: vi.fn(),
+}))
+
+vi.mock('@/api/guestOrders', () => ({
+  fetchGuestOrder: mocks.mockFetchGuestOrder,
+  payGuestOrder: mocks.mockPayGuestOrder,
+}))
+
+vi.mock('@/api/payment', () => ({
+  fetchSwishInfo: mocks.mockFetchSwishInfo,
+  buildSwishPaymentUrl: mocks.mockBuildSwishPaymentUrl,
+}))
+
+vi.mock('qrcode', () => ({
+  default: {
+    toDataURL: mocks.mockToDataURL,
+  },
+}))
+
+import GuestPaymentRedirect from '@/pages/GuestPaymentRedirect.vue'
+import QRCode from 'qrcode'
+
+const mockToDataURL = vi.mocked(QRCode.toDataURL)
+
+const mockOrder = {
+  id: 'order-123',
+  plate: 'ABC123',
+  letterText: 'Hej',
+  status: 'pending_payment',
+  trackingId: null,
+  amountPaid: null,
+  createdAt: '2025-01-01T00:00:00Z',
+  guestToken: 'token-abc',
+}
+
+function createTestRouter() {
+  return createRouter({
+    history: createMemoryHistory(),
+    routes: [
+      { path: '/', name: 'home', component: { template: '<div>Home</div>' } },
+      {
+        path: '/gast-betalning/:orderId',
+        name: 'guest-payment',
+        component: GuestPaymentRedirect,
+      },
+      {
+        path: '/gast-order/:token',
+        name: 'guest-order',
+        component: { template: '<div>Order</div>' },
+      },
+    ],
+  })
+}
+
+async function mountPage(
+  orderId = 'order-123',
+  token = 'token-abc',
+  plate = 'ABC123',
+) {
+  const pinia = createPinia()
+  setActivePinia(pinia)
+  const router = createTestRouter()
+  await router.push({
+    name: 'guest-payment',
+    params: { orderId },
+    query: { token, plate },
+  })
+  await router.isReady()
+
+  const wrapper = mount(GuestPaymentRedirect, {
+    global: { plugins: [router, pinia] },
+  })
+
+  return { wrapper, router }
+}
+
+function setupDefaultMocks() {
+  mocks.mockFetchSwishInfo.mockResolvedValue({
+    number: '0701234567',
+    amount: 49,
+  })
+  mocks.mockFetchGuestOrder.mockResolvedValue(mockOrder)
+  mocks.mockBuildSwishPaymentUrl.mockReturnValue(
+    'https://app.swish.nu/1/p/sw/?sw=46701234567&amt=49.00&msg=order-123',
+  )
+  mocks.mockToDataURL.mockResolvedValue('data:image/png;base64,mock-qr')
+}
+
+describe('GuestPaymentRedirect', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    setupDefaultMocks()
+  })
+
+  it('renders heading and plate', async () => {
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Betalning')
+    })
+    expect(wrapper.text()).toContain('ABC123')
+  })
+
+  it('displays order id', async () => {
+    const { wrapper } = await mountPage('order-456')
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('order-456')
+    })
+  })
+
+  it('shows the amount to pay', async () => {
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('49 kr')
+    })
+  })
+
+  it('renders QR code after loading swish info', async () => {
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.find('.payment__qr-img').exists()).toBe(true)
+    })
+    expect(mockToDataURL).toHaveBeenCalledTimes(1)
+  })
+
+  it('renders Swish payment link', async () => {
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      const link = wrapper.find('.payment__swish-link')
+      expect(link.exists()).toBe(true)
+      expect(link.attributes('href')).toContain('app.swish.nu')
+    })
+  })
+
+  it('displays Swish number from API', async () => {
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('0701234567')
+    })
+  })
+
+  it('shows the "Jag har betalat" button', async () => {
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.find('.payment__submit').exists()).toBe(true)
+      expect(wrapper.text()).toContain('Jag har betalat')
+    })
+  })
+
+  it('shows confirmation dialog when clicking "Jag har betalat"', async () => {
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.find('.payment__submit').exists()).toBe(true)
+    })
+
+    await wrapper.find('.payment__submit').trigger('click')
+
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Jag bekräftar att jag har Swishat')
+      expect(wrapper.text()).toContain('0701234567')
+    })
+  })
+
+  it('can cancel the confirmation dialog', async () => {
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.find('.payment__submit').exists()).toBe(true)
+    })
+
+    await wrapper.find('.payment__submit').trigger('click')
+    await vi.waitFor(() => {
+      expect(wrapper.find('.payment__confirm-cancel').exists()).toBe(true)
+    })
+
+    await wrapper.find('.payment__confirm-cancel').trigger('click')
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Jag har betalat')
+      expect(wrapper.text()).not.toContain('Jag bekräftar')
+    })
+  })
+
+  it('calls payGuestOrder on confirmation', async () => {
+    mocks.mockPayGuestOrder.mockResolvedValue({
+      ...mockOrder,
+      status: 'processing',
+    })
+
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.find('.payment__submit').exists()).toBe(true)
+    })
+
+    await wrapper.find('.payment__submit').trigger('click')
+    await vi.waitFor(() => {
+      expect(wrapper.find('.payment__confirm .btn--primary').exists()).toBe(
+        true,
+      )
+    })
+
+    await wrapper.find('.payment__confirm .btn--primary').trigger('click')
+
+    expect(mocks.mockPayGuestOrder).toHaveBeenCalledWith('token-abc')
+  })
+
+  it('navigates to guest-order after successful payment', async () => {
+    mocks.mockPayGuestOrder.mockResolvedValue({
+      ...mockOrder,
+      status: 'processing',
+    })
+
+    const { wrapper, router } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.find('.payment__submit').exists()).toBe(true)
+    })
+
+    await wrapper.find('.payment__submit').trigger('click')
+    await vi.waitFor(() => {
+      expect(wrapper.find('.payment__confirm .btn--primary').exists()).toBe(
+        true,
+      )
+    })
+
+    await wrapper.find('.payment__confirm .btn--primary').trigger('click')
+
+    await vi.waitFor(() => {
+      expect(router.currentRoute.value.name).toBe('guest-order')
+      expect(router.currentRoute.value.params.token).toBe('token-abc')
+    })
+  })
+
+  it('shows error when payment confirmation fails', async () => {
+    mocks.mockPayGuestOrder.mockRejectedValue(new Error('Network error'))
+
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.find('.payment__submit').exists()).toBe(true)
+    })
+
+    await wrapper.find('.payment__submit').trigger('click')
+    await vi.waitFor(() => {
+      expect(wrapper.find('.payment__confirm .btn--primary').exists()).toBe(
+        true,
+      )
+    })
+
+    await wrapper.find('.payment__confirm .btn--primary').trigger('click')
+
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain(
+        'Kunde inte bekräfta betalningen. Försök igen.',
+      )
+    })
+  })
+
+  it('shows error when swish info fetch fails', async () => {
+    mocks.mockFetchSwishInfo.mockRejectedValue(new Error('Network error'))
+
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain(
+        'Kunde inte ladda betalningsinformation. Försök igen senare.',
+      )
+    })
+  })
+
+  it('shows error when token is missing', async () => {
+    const { wrapper } = await mountPage('order-123', '', 'ABC123')
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain(
+        'Saknar order-token. Gå tillbaka och försök igen.',
+      )
+    })
+    expect(mocks.mockFetchSwishInfo).not.toHaveBeenCalled()
+  })
+
+  it('redirects to guest-order when order is already paid', async () => {
+    mocks.mockFetchGuestOrder.mockResolvedValue({
+      ...mockOrder,
+      status: 'processing',
+    })
+
+    const { router } = await mountPage()
+    await vi.waitFor(() => {
+      expect(router.currentRoute.value.name).toBe('guest-order')
+      expect(router.currentRoute.value.params.token).toBe('token-abc')
+    })
+  })
+
+  it('shows the magic order link', async () => {
+    const { wrapper } = await mountPage()
+    await vi.waitFor(() => {
+      expect(wrapper.text()).toContain('Din orderlänk')
+    })
+    expect(wrapper.find('.guest-payment__magic-url').text()).toContain(
+      'token-abc',
+    )
+  })
+})
diff --git a/frontend/src/__tests__/guestOrders.spec.ts b/frontend/src/__tests__/guestOrders.spec.ts
new file mode 100644
index 0000000..05215ed
--- /dev/null
+++ b/frontend/src/__tests__/guestOrders.spec.ts
@@ -0,0 +1,104 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest'
+import { createPinia, setActivePinia } from 'pinia'
+
+const mocks = vi.hoisted(() => ({
+  mockRequest: vi.fn(),
+}))
+
+vi.mock('@/api/client', () => ({
+  request: mocks.mockRequest,
+}))
+
+import {
+  createGuestOrder,
+  fetchGuestOrder,
+  payGuestOrder,
+} from '@/api/guestOrders'
+
+describe('guestOrders API', () => {
+  beforeEach(() => {
+    setActivePinia(createPinia())
+    mocks.mockRequest.mockReset()
+  })
+
+  describe('createGuestOrder', () => {
+    it('sends a POST to /guest-orders with plate, letterText, and email', async () => {
+      const mockOrder = {
+        id: 'order-1',
+        plate: 'ABC123',
+        letterText: 'Hej',
+        status: 'pending_payment',
+        trackingId: null,
+        amountPaid: null,
+        createdAt: '2025-01-01T00:00:00Z',
+        guestToken: 'token-abc',
+      }
+      mocks.mockRequest.mockResolvedValue(mockOrder)
+
+      const result = await createGuestOrder('ABC123', 'Hej', 'test@example.se')
+
+      expect(mocks.mockRequest).toHaveBeenCalledWith('/guest-orders', {
+        method: 'POST',
+        body: JSON.stringify({
+          plate: 'ABC123',
+          letterText: 'Hej',
+          email: 'test@example.se',
+        }),
+      })
+      expect(result).toEqual(mockOrder)
+    })
+
+    it('propagates errors from the API client', async () => {
+      mocks.mockRequest.mockRejectedValue(new Error('Server error'))
+
+      await expect(
+        createGuestOrder('ABC123', 'Hej', 'test@example.se'),
+      ).rejects.toThrow('Server error')
+    })
+  })
+
+  describe('fetchGuestOrder', () => {
+    it('sends a GET to /guest-orders/:token', async () => {
+      const mockOrder = {
+        id: 'order-1',
+        plate: 'ABC123',
+        letterText: 'Hej',
+        status: 'pending_payment',
+        trackingId: null,
+        amountPaid: null,
+        createdAt: '2025-01-01T00:00:00Z',
+        guestToken: 'token-abc',
+      }
+      mocks.mockRequest.mockResolvedValue(mockOrder)
+
+      const result = await fetchGuestOrder('token-abc')
+
+      expect(mocks.mockRequest).toHaveBeenCalledWith('/guest-orders/token-abc')
+      expect(result).toEqual(mockOrder)
+    })
+  })
+
+  describe('payGuestOrder', () => {
+    it('sends a POST to /guest-orders/:token/pay', async () => {
+      const mockOrder = {
+        id: 'order-1',
+        plate: 'ABC123',
+        letterText: 'Hej',
+        status: 'processing',
+        trackingId: null,
+        amountPaid: 49,
+        createdAt: '2025-01-01T00:00:00Z',
+        guestToken: 'token-abc',
+      }
+      mocks.mockRequest.mockResolvedValue(mockOrder)
+
+      const result = await payGuestOrder('token-abc')
+
+      expect(mocks.mockRequest).toHaveBeenCalledWith(
+        '/guest-orders/token-abc/pay',
+        { method: 'POST' },
+      )
+      expect(result).toEqual(mockOrder)
+    })
+  })
+})