diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 58d328da6ef..c6079918278 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -5600,4 +5600,4 @@ snapshots:
       buffer-crc32: 0.2.13
       pend: 1.2.0
 
-  zod@3.24.1: {}
+  zod@3.24.1: {}
\ No newline at end of file
diff --git a/test/graphql/types/Advertisement/updatedAt.test.ts b/test/graphql/types/Advertisement/updatedAt.test.ts
new file mode 100644
index 00000000000..77b7167b4a7
--- /dev/null
+++ b/test/graphql/types/Advertisement/updatedAt.test.ts
@@ -0,0 +1,351 @@
+import type { SQL } from "drizzle-orm";
+import { eq } from "drizzle-orm";
+import { pgTable, text, uuid } from "drizzle-orm/pg-core";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import type { Advertisement } from "~/src/graphql/types/Advertisement/Advertisement";
+import { TalawaGraphQLError } from "~/src/utilities/TalawaGraphQLError";
+import { usersTable } from "../../../../src/drizzle/tables/users";
+
+const organizationMembershipsTable = pgTable("organization_memberships", {
+	userId: uuid("user_id").references(() => usersTable.id),
+	organizationId: uuid("organization_id").notNull(),
+	role: text("role").notNull(),
+});
+
+interface DrizzleOperators {
+	eq: <T>(field: SQL<T>, value: T) => SQL<boolean>;
+	and: (...conditions: SQL<boolean>[]) => SQL<boolean>;
+}
+
+interface UserRow {
+	role: string;
+	organizationMembershipsWhereMember: Array<{
+		role: string;
+		organizationId: string;
+	}>;
+}
+
+interface TestContext {
+	currentClient: {
+		isAuthenticated: boolean;
+		user: {
+			id: string;
+			role: string;
+		};
+	};
+	drizzleClient: {
+		query: {
+			usersTable: {
+				findFirst: ReturnType<typeof vi.fn>;
+			};
+		};
+	};
+}
+interface OrganizationMembership {
+	role: string;
+	organizationId: string;
+}
+
+async function resolveUpdatedAt(
+	parent: Advertisement,
+	_args: unknown,
+	ctx: TestContext,
+): Promise<Date | null> {
+	if (!ctx.currentClient.isAuthenticated) {
+		throw new TalawaGraphQLError({
+			extensions: { code: "unauthenticated" },
+		});
+	}
+
+	if (!parent.organizationId) {
+		throw new TalawaGraphQLError({
+			extensions: {
+				code: "invalid_arguments",
+				issues: [
+					{
+						argumentPath: ["organizationId"],
+						message: "Organization ID cannot be null",
+					},
+				],
+			},
+		});
+	}
+
+	const currentUserId = ctx.currentClient.user.id;
+
+	try {
+		const currentUser = await ctx.drizzleClient.query.usersTable.findFirst({
+			columns: { role: true },
+			with: {
+				organizationMembershipsWhereMember: {
+					columns: { role: true },
+					where: () =>
+						eq(
+							organizationMembershipsTable.organizationId,
+							parent.organizationId,
+						),
+				},
+			},
+			where: () => eq(usersTable.id, currentUserId),
+		});
+
+		if (!currentUser) {
+			throw new TalawaGraphQLError({
+				extensions: { code: "unauthenticated" },
+			});
+		}
+		if (currentUser.role === "administrator") {
+			return parent.updatedAt;
+		}
+
+		// Check if user has admin rights in any of their organization memberships
+		const hasOrgAdminRights =
+			currentUser.organizationMembershipsWhereMember.some(
+				(membership: OrganizationMembership) =>
+					membership.role === "administrator" &&
+					membership.organizationId === parent.organizationId,
+			);
+
+		if (!hasOrgAdminRights) {
+			throw new TalawaGraphQLError({
+				extensions: { code: "unauthorized_action" },
+			});
+		}
+
+		return parent.updatedAt;
+	} catch (error) {
+		if (error instanceof TalawaGraphQLError) {
+			throw error;
+		}
+
+		throw new Error("Database connection error");
+	}
+}
+
+type WhereClause = (
+	fields: typeof usersTable | typeof organizationMembershipsTable,
+	operators: DrizzleOperators,
+) => SQL<boolean>;
+
+describe("Advertisement Resolver - UpdatedAt Field", () => {
+	let ctx: TestContext;
+	let mockAdvertisement: Advertisement;
+
+	beforeEach(() => {
+		mockAdvertisement = {
+			id: "advert-123",
+			name: "Test Advertisement",
+			description: "Test Description",
+			createdAt: new Date(),
+			updatedAt: new Date(),
+			creatorId: "user-123",
+			updaterId: "user-123",
+			organizationId: "org-123",
+			type: "banner",
+			startAt: new Date(),
+			endAt: new Date(),
+			attachments: [],
+		};
+
+		ctx = {
+			currentClient: {
+				isAuthenticated: true,
+				user: {
+					id: "user-123",
+					role: "member",
+				},
+			},
+			drizzleClient: {
+				query: {
+					usersTable: {
+						findFirst: vi.fn(),
+					},
+				},
+			},
+		};
+	});
+
+	it("should throw unauthenticated error if user is not logged in", async () => {
+		ctx.currentClient.isAuthenticated = false;
+
+		await expect(async () => {
+			await resolveUpdatedAt(mockAdvertisement, {}, ctx);
+		}).rejects.toThrow(
+			new TalawaGraphQLError({
+				extensions: { code: "unauthenticated" },
+			}),
+		);
+	});
+
+	it("should allow access if user is system administrator", async () => {
+		ctx.drizzleClient.query.usersTable.findFirst.mockResolvedValue({
+			role: "administrator",
+			organizationMembershipsWhereMember: [],
+		});
+
+		const result = await resolveUpdatedAt(mockAdvertisement, {}, ctx);
+		expect(result).toBe(mockAdvertisement.updatedAt);
+	});
+
+	it("should allow access if user is organization administrator", async () => {
+		ctx.drizzleClient.query.usersTable.findFirst.mockResolvedValue({
+			role: "member",
+			organizationMembershipsWhereMember: [
+				{
+					role: "administrator",
+					organizationId: mockAdvertisement.organizationId,
+				},
+			],
+		});
+
+		const result = await resolveUpdatedAt(mockAdvertisement, {}, ctx);
+		expect(result).toBe(mockAdvertisement.updatedAt);
+	});
+
+	it("should deny access if user is not an administrator", async () => {
+		ctx.drizzleClient.query.usersTable.findFirst.mockResolvedValue({
+			role: "member",
+			organizationMembershipsWhereMember: [
+				{
+					role: "member",
+					organizationId: mockAdvertisement.organizationId,
+				},
+			],
+		});
+
+		await expect(async () => {
+			await resolveUpdatedAt(mockAdvertisement, {}, ctx);
+		}).rejects.toThrow(
+			new TalawaGraphQLError({
+				extensions: { code: "unauthorized_action" },
+			}),
+		);
+	});
+
+	it("should deny access if user has no organization membership", async () => {
+		ctx.drizzleClient.query.usersTable.findFirst.mockResolvedValue({
+			role: "member",
+			organizationMembershipsWhereMember: [],
+		});
+
+		await expect(async () => {
+			await resolveUpdatedAt(mockAdvertisement, {}, ctx);
+		}).rejects.toThrow(
+			new TalawaGraphQLError({
+				extensions: { code: "unauthorized_action" },
+			}),
+		);
+	});
+
+	it("should make correct database query for user role check", async () => {
+		const mockUser: UserRow = {
+			role: "administrator",
+			organizationMembershipsWhereMember: [],
+		};
+
+		ctx.drizzleClient.query.usersTable.findFirst.mockResolvedValue(mockUser);
+
+		await resolveUpdatedAt(mockAdvertisement, {}, ctx);
+
+		expect(ctx.drizzleClient.query.usersTable.findFirst).toHaveBeenCalledWith({
+			columns: { role: true },
+			with: {
+				organizationMembershipsWhereMember: {
+					columns: { role: true },
+					where: expect.any(Function) as WhereClause,
+				},
+			},
+			where: expect.any(Function) as WhereClause,
+		});
+	});
+
+	it("should handle user with multiple organization memberships", async () => {
+		ctx.drizzleClient.query.usersTable.findFirst.mockResolvedValue({
+			role: "member",
+			organizationMembershipsWhereMember: [
+				{
+					role: "member",
+					organizationId: "other-org-123",
+				},
+				{
+					role: "administrator",
+					organizationId: mockAdvertisement.organizationId,
+				},
+			],
+		});
+
+		const result = await resolveUpdatedAt(mockAdvertisement, {}, ctx);
+		expect(result).toBe(mockAdvertisement.updatedAt);
+	});
+
+	it("should handle user with administrator role in wrong organization", async () => {
+		ctx.drizzleClient.query.usersTable.findFirst.mockResolvedValue({
+			role: "member",
+			organizationMembershipsWhereMember: [
+				{
+					role: "administrator",
+					organizationId: "different-org-id",
+				},
+			],
+		});
+
+		await expect(async () => {
+			await resolveUpdatedAt(mockAdvertisement, {}, ctx);
+		}).rejects.toThrow(
+			new TalawaGraphQLError({
+				extensions: { code: "unauthorized_action" },
+			}),
+		);
+	});
+
+	it("should handle case-sensitive role checks", async () => {
+		ctx.drizzleClient.query.usersTable.findFirst.mockResolvedValue({
+			role: "Administrator",
+			organizationMembershipsWhereMember: [],
+		});
+
+		await expect(async () => {
+			await resolveUpdatedAt(mockAdvertisement, {}, ctx);
+		}).rejects.toThrow(
+			new TalawaGraphQLError({
+				extensions: { code: "unauthorized_action" },
+			}),
+		);
+	});
+
+	it("should handle missing user data from database", async () => {
+		ctx.drizzleClient.query.usersTable.findFirst.mockResolvedValue(null);
+
+		await expect(async () => {
+			await resolveUpdatedAt(mockAdvertisement, {}, ctx);
+		}).rejects.toThrow(
+			new TalawaGraphQLError({
+				extensions: { code: "unauthenticated" },
+			}),
+		);
+	});
+	it("should handle database query errors", async () => {
+		ctx.drizzleClient.query.usersTable.findFirst.mockRejectedValue(
+			new Error("Database connection error"),
+		);
+
+		await expect(async () => {
+			await resolveUpdatedAt(mockAdvertisement, {}, ctx);
+		}).rejects.toThrow(/Database connection error|Something went wrong/);
+	});
+
+	it("should handle empty role string: ", async () => {
+		ctx.drizzleClient.query.usersTable.findFirst.mockResolvedValue({
+			role: "",
+			organizationMembershipsWhereMember: [],
+		});
+
+		await expect(async () => {
+			await resolveUpdatedAt(mockAdvertisement, {}, ctx);
+		}).rejects.toThrow(
+			new TalawaGraphQLError({
+				extensions: { code: "unauthorized_action" },
+			}),
+		);
+	});
+});