diff --git a/src/__tests__/notification-delivery-identity.test.ts b/src/__tests__/notification-delivery-identity.test.ts
index 7cd591d7d..f29c3f9b2 100644
--- a/src/__tests__/notification-delivery-identity.test.ts
+++ b/src/__tests__/notification-delivery-identity.test.ts
@@ -10,6 +10,7 @@ vi.mock("@/lib/db", () => ({
       upsert: vi.fn(),
     },
     user: { findUnique: vi.fn() },
+    accountGrant: { findMany: vi.fn() },
     auditLog: { create: vi.fn() },
     $transaction: (...args: unknown[]) => transactionMock(...args),
   },
@@ -32,15 +33,17 @@ vi.mock("@/lib/logging/context", () => ({
 }));
 
 const sendViaWebPushMock = vi.fn();
+const sendViaNtfyMock = vi.fn();
+const sendViaApnsMock = vi.fn();
 
 vi.mock("@/lib/notifications/senders/apns", () => ({
-  sendViaApns: vi.fn(),
+  sendViaApns: (...args: unknown[]) => sendViaApnsMock(...args),
 }));
 vi.mock("@/lib/notifications/senders/email", () => ({
   sendViaEmail: vi.fn(),
 }));
 vi.mock("@/lib/notifications/senders/ntfy", () => ({
-  sendViaNtfy: vi.fn(),
+  sendViaNtfy: (...args: unknown[]) => sendViaNtfyMock(...args),
 }));
 vi.mock("@/lib/notifications/senders/telegram", () => ({
   sendViaTelegram: vi.fn(),
@@ -94,6 +97,8 @@ beforeEach(() => {
       }),
   );
   sendViaWebPushMock.mockResolvedValue({ ok: true });
+  sendViaNtfyMock.mockResolvedValue({ ok: true });
+  sendViaApnsMock.mockResolvedValue({ ok: true });
 });
 
 describe("notification delivery identity", () => {
@@ -180,4 +185,155 @@ describe("notification delivery identity", () => {
     );
     expect(sendViaWebPushMock).not.toHaveBeenCalled();
   });
+
+  it("renders for each Guardian while isolating channel preferences", async () => {
+    const firstGuardian = "guardian-en";
+    const secondGuardian = "guardian-de";
+
+    (
+      prisma.user.findUnique as unknown as ReturnType<typeof vi.fn>
+    ).mockImplementation(async ({ where }: { where: { id: string } }) => {
+      if (where.id === recordUserId) {
+        return { managedProfileAt: new Date() } as never;
+      }
+      if (where.id === firstGuardian) {
+        return {
+          managedProfileAt: null,
+          locale: "en",
+          notificationPrefs: { medication: { clientManaged: true } },
+        } as never;
+      }
+      return {
+        managedProfileAt: null,
+        locale: "de",
+        notificationPrefs: { medication: { clientManaged: true } },
+      } as never;
+    });
+    vi.mocked(prisma.accountGrant.findMany).mockResolvedValue([
+      { granteeId: firstGuardian, grantee: { managedProfileAt: null } },
+      { granteeId: secondGuardian, grantee: { managedProfileAt: null } },
+    ] as never);
+    (
+      prisma.notificationChannel.findMany as unknown as ReturnType<typeof vi.fn>
+    ).mockImplementation(async ({ where }: { where: { userId: string } }) => {
+      if (where.userId === firstGuardian) {
+        return [
+          {
+            id: "first-web-disabled",
+            userId: firstGuardian,
+            type: "WEB_PUSH",
+            config: "{}",
+            nextRetryAt: null,
+            preferences: [{ eventType: "MEDICATION_REMINDER", enabled: false }],
+          },
+          {
+            id: "first-ntfy-enabled",
+            userId: firstGuardian,
+            type: "NTFY",
+            config: "{}",
+            nextRetryAt: null,
+            preferences: [],
+          },
+        ] as never;
+      }
+      return [
+        {
+          id: "second-web-enabled",
+          userId: secondGuardian,
+          type: "WEB_PUSH",
+          config: "{}",
+          nextRetryAt: null,
+          preferences: [],
+        },
+        {
+          id: "second-ntfy-disabled",
+          userId: secondGuardian,
+          type: "NTFY",
+          config: "{}",
+          nextRetryAt: null,
+          preferences: [{ eventType: "MEDICATION_REMINDER", enabled: false }],
+        },
+      ] as never;
+    });
+
+    const outcome = await dispatchNotification({
+      eventType: "MEDICATION_REMINDER",
+      userId: recordUserId,
+      title: "record-language-title",
+      message: "record-language-message",
+      renderForRecipient: (locale) => ({
+        title: `title-${locale}`,
+        message: `message-${locale}`,
+      }),
+    });
+
+    expect(outcome).toEqual({
+      dispatched: true,
+      channelsAttempted: 2,
+      channelsSucceeded: 2,
+    });
+    expect(sendViaNtfyMock).toHaveBeenCalledWith(
+      {},
+      expect.objectContaining({
+        recipientUserId: firstGuardian,
+        title: "title-en",
+        message: "message-en",
+      }),
+    );
+    expect(sendViaWebPushMock).toHaveBeenCalledWith(
+      secondGuardian,
+      expect.objectContaining({
+        recipientUserId: secondGuardian,
+        title: "title-de",
+        message: "message-de",
+      }),
+    );
+    expect(sendViaWebPushMock).toHaveBeenCalledTimes(1);
+    expect(sendViaNtfyMock).toHaveBeenCalledTimes(1);
+  });
+
+  it("bypasses client-managed APNs suppression only for managed Guardian delivery", async () => {
+    const guardian = "guardian-apns";
+    (
+      prisma.user.findUnique as unknown as ReturnType<typeof vi.fn>
+    ).mockImplementation(
+      async ({ where }: { where: { id: string } }) =>
+        (where.id === recordUserId
+          ? { managedProfileAt: new Date() }
+          : {
+              managedProfileAt: null,
+              notificationPrefs: { medication: { clientManaged: true } },
+            }) as never,
+    );
+    vi.mocked(prisma.accountGrant.findMany).mockResolvedValue([
+      { granteeId: guardian, grantee: { managedProfileAt: null } },
+    ] as never);
+    vi.mocked(prisma.notificationChannel.findMany).mockResolvedValue([
+      {
+        id: "guardian-apns",
+        userId: guardian,
+        type: "APNS",
+        config: "{}",
+        nextRetryAt: null,
+        preferences: [],
+      },
+    ] as never);
+
+    await expect(
+      dispatchNotification({
+        eventType: "MEDICATION_REMINDER",
+        userId: recordUserId,
+        title: "Record content",
+        message: "Record schedule",
+      }),
+    ).resolves.toMatchObject({ dispatched: true, channelsSucceeded: 1 });
+
+    expect(sendViaApnsMock).toHaveBeenCalledWith(
+      guardian,
+      expect.objectContaining({
+        recordUserId,
+        recipientUserId: guardian,
+      }),
+    );
+  });
 });
diff --git a/tests/integration/guardian-notification-fanout.test.ts b/tests/integration/guardian-notification-fanout.test.ts
new file mode 100644
index 000000000..469b1449f
--- /dev/null
+++ b/tests/integration/guardian-notification-fanout.test.ts
@@ -0,0 +1,202 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const sent = vi.hoisted(() => ({
+  ntfy: [] as Array<{
+    recipientUserId: string;
+    title: string;
+    message: string;
+  }>,
+  apns: [] as Array<{ recipientUserId: string; recordUserId?: string }>,
+}));
+
+vi.mock("@/lib/notifications/senders/ntfy", () => ({
+  sendViaNtfy: async (
+    _config: unknown,
+    payload: { recipientUserId?: string; title: string; message: string },
+  ) => {
+    sent.ntfy.push({
+      recipientUserId: payload.recipientUserId ?? "missing",
+      title: payload.title,
+      message: payload.message,
+    });
+    return { ok: true };
+  },
+}));
+
+vi.mock("@/lib/notifications/senders/apns", () => ({
+  sendViaApns: async (
+    recipientUserId: string,
+    payload: { recordUserId?: string },
+  ) => {
+    sent.apns.push({ recipientUserId, recordUserId: payload.recordUserId });
+    return { ok: true };
+  },
+}));
+
+import { encrypt } from "@/lib/crypto";
+import type { Locale } from "@/lib/i18n/config";
+import { dispatchNotification } from "@/lib/notifications/dispatcher";
+import { getPrismaClient, truncateAllTables } from "./setup";
+
+let sequence = 0;
+
+async function createUser(input: {
+  label: string;
+  locale: "en" | "de";
+  managed?: boolean;
+  clientManaged?: boolean;
+}) {
+  const suffix = sequence++;
+  return getPrismaClient().user.create({
+    data: {
+      username: `${input.label}-${suffix}`,
+      email: `${input.label}-${suffix}@example.test`,
+      locale: input.locale,
+      managedProfileAt: input.managed ? new Date() : null,
+      notificationPrefs: input.clientManaged
+        ? { medication: { clientManaged: true } }
+        : undefined,
+    },
+  });
+}
+
+async function addGuardian(recordUserId: string, recipientUserId: string) {
+  await getPrismaClient().accountGrant.create({
+    data: {
+      grantorId: recordUserId,
+      granteeId: recipientUserId,
+      access: "MANAGE",
+      acceptedAt: new Date(),
+    },
+  });
+}
+
+async function addChannel(
+  userId: string,
+  type: "NTFY" | "APNS",
+  enabled = true,
+) {
+  await getPrismaClient().notificationChannel.create({
+    data: {
+      userId,
+      type,
+      enabled,
+      config: encrypt("{}"),
+    },
+  });
+}
+
+beforeEach(async () => {
+  sent.ntfy.length = 0;
+  sent.apns.length = 0;
+  await truncateAllTables(getPrismaClient());
+});
+
+describe("Guardian fan-out (real Postgres)", () => {
+  it("isolates recipient locale and global preference across two Guardians and two records", async () => {
+    const [recordA, recordB, guardianEn, guardianDe] = await Promise.all([
+      createUser({ label: "record-a", locale: "en", managed: true }),
+      createUser({ label: "record-b", locale: "de", managed: true }),
+      createUser({ label: "guardian-en", locale: "en" }),
+      createUser({ label: "guardian-de", locale: "de" }),
+    ]);
+    await Promise.all([
+      addGuardian(recordA.id, guardianEn.id),
+      addGuardian(recordA.id, guardianDe.id),
+      addGuardian(recordB.id, guardianEn.id),
+      addGuardian(recordB.id, guardianDe.id),
+      addChannel(guardianEn.id, "NTFY"),
+      addChannel(guardianDe.id, "NTFY"),
+    ]);
+
+    const renderForRecipient = (locale: Locale) => ({
+      title: `title-${locale}`,
+      message: `message-${locale}`,
+    });
+    await dispatchNotification({
+      eventType: "MEDICATION_REMINDER",
+      userId: recordA.id,
+      title: "record-a-title",
+      message: "record-a-message",
+      renderForRecipient,
+    });
+
+    expect(sent.ntfy).toEqual(
+      expect.arrayContaining([
+        {
+          recipientUserId: guardianEn.id,
+          title: "title-en",
+          message: "message-en",
+        },
+        {
+          recipientUserId: guardianDe.id,
+          title: "title-de",
+          message: "message-de",
+        },
+      ]),
+    );
+
+    await getPrismaClient().notificationPreference.create({
+      data: {
+        channel: {
+          connect: { userId_type: { userId: guardianEn.id, type: "NTFY" } },
+        },
+        eventType: "MEDICATION_REMINDER",
+        enabled: false,
+      },
+    });
+    sent.ntfy.length = 0;
+
+    await dispatchNotification({
+      eventType: "MEDICATION_REMINDER",
+      userId: recordB.id,
+      title: "record-b-title",
+      message: "record-b-message",
+      renderForRecipient,
+    });
+
+    expect(sent.ntfy).toEqual([
+      {
+        recipientUserId: guardianDe.id,
+        title: "title-de",
+        message: "message-de",
+      },
+    ]);
+  });
+
+  it("bypasses client-managed suppression for each Guardian but not self delivery", async () => {
+    const [record, guardianEn, guardianDe] = await Promise.all([
+      createUser({ label: "record", locale: "en", managed: true }),
+      createUser({
+        label: "guardian-en",
+        locale: "en",
+        clientManaged: true,
+      }),
+      createUser({
+        label: "guardian-de",
+        locale: "de",
+        clientManaged: true,
+      }),
+    ]);
+    await Promise.all([
+      addGuardian(record.id, guardianEn.id),
+      addGuardian(record.id, guardianDe.id),
+      addChannel(guardianEn.id, "APNS"),
+      addChannel(guardianDe.id, "APNS"),
+    ]);
+
+    await dispatchNotification({
+      eventType: "MEDICATION_REMINDER",
+      userId: record.id,
+      title: "record-title",
+      message: "record-message",
+    });
+
+    expect(sent.apns).toEqual(
+      expect.arrayContaining([
+        { recipientUserId: guardianEn.id, recordUserId: record.id },
+        { recipientUserId: guardianDe.id, recordUserId: record.id },
+      ]),
+    );
+  });
+});