diff --git a/src/layout/SigningDocumentList/SigningDocumentListComponent.test.tsx b/src/layout/SigningDocumentList/SigningDocumentListComponent.test.tsx
index 9fde8a0a34..34981277a3 100644
--- a/src/layout/SigningDocumentList/SigningDocumentListComponent.test.tsx
+++ b/src/layout/SigningDocumentList/SigningDocumentListComponent.test.tsx
@@ -49,6 +49,7 @@ jest.mock('src/features/language/Lang', () => ({
 jest.mock('src/features/applicationMetadata/ApplicationMetadataProvider', () => ({
   useApplicationMetadata: jest.fn(() => ({
     dataTypes: [],
+    altinnNugetVersion: '8.9.0.225',
   })),
 }));
 
diff --git a/src/layout/SigningDocumentList/SigningDocumentListComponent.tsx b/src/layout/SigningDocumentList/SigningDocumentListComponent.tsx
index ec39915538..eef039c17d 100644
--- a/src/layout/SigningDocumentList/SigningDocumentListComponent.tsx
+++ b/src/layout/SigningDocumentList/SigningDocumentListComponent.tsx
@@ -6,6 +6,7 @@ import { DownloadIcon } from '@navikt/aksel-icons';
 
 import { AppTable } from 'src/app-components/Table/Table';
 import { Caption } from 'src/components/form/caption/Caption';
+import { useApplicationMetadata } from 'src/features/applicationMetadata/ApplicationMetadataProvider';
 import { Lang } from 'src/features/language/Lang';
 import { useLanguage } from 'src/features/language/useLanguage';
 import classes from 'src/layout/SigneeList/SigneeListComponent.module.css';
@@ -21,8 +22,9 @@ export function SigningDocumentListComponent({
 }) {
   const { instanceOwnerPartyId, instanceGuid } = useParams();
   const { langAsString } = useLanguage();
+  const { altinnNugetVersion } = useApplicationMetadata();
 
-  const { data, isLoading, error } = useDocumentList(instanceOwnerPartyId, instanceGuid);
+  const { data, isLoading, error } = useDocumentList(instanceOwnerPartyId, instanceGuid, altinnNugetVersion);
 
   if (error) {
     return <SigningDocumentListError error={error} />;
diff --git a/src/layout/SigningDocumentList/api.test.ts b/src/layout/SigningDocumentList/api.test.ts
new file mode 100644
index 0000000000..fd9934e590
--- /dev/null
+++ b/src/layout/SigningDocumentList/api.test.ts
@@ -0,0 +1,88 @@
+import { jest } from '@jest/globals';
+import { useQuery } from '@tanstack/react-query';
+import { renderHook } from '@testing-library/react';
+
+import { type SigningDocument, useDocumentList } from 'src/layout/SigningDocumentList/api';
+import { httpGet } from 'src/utils/network/sharedNetworking';
+
+jest.mock('@tanstack/react-query', () => ({
+  useQuery: jest.fn(),
+}));
+
+jest.mock('src/utils/network/sharedNetworking', () => ({
+  httpGet: jest.fn(),
+}));
+
+describe('useDocumentList', () => {
+  const mockedUseQuery = jest.mocked(useQuery);
+  const mockedHttpGet = jest.mocked(httpGet);
+
+  const response = {
+    dataElements: [
+      {
+        id: '1',
+        dataType: 'attachment',
+        contentType: 'application/pdf',
+        filename: 'zeta.pdf',
+        size: 100,
+        tags: ['tag-a'],
+        selfLinks: {
+          apps: 'https://storage.example.com/zeta.pdf',
+        },
+      },
+      {
+        id: '2',
+        dataType: 'attachment',
+        contentType: 'application/pdf',
+        filename: 'alpha.pdf',
+        size: 200,
+        tags: ['tag-b'],
+        selfLinks: {
+          apps: 'https://storage.example.com/alpha.pdf',
+        },
+      },
+    ],
+  };
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+    mockedHttpGet.mockResolvedValue(response);
+  });
+
+  function hasQueryFn(value: unknown): value is { queryFn: () => Promise<SigningDocument[]> } {
+    if (typeof value !== 'object' || value === null) {
+      return false;
+    }
+
+    return 'queryFn' in value && typeof value.queryFn === 'function';
+  }
+
+  const runQueryFn = async (altinnNugetVersion: string | undefined): Promise<SigningDocument[]> => {
+    mockedUseQuery.mockReturnValue({} as ReturnType<typeof useQuery>);
+
+    renderHook(() => useDocumentList('party-id', 'instance-guid', altinnNugetVersion));
+
+    const [queryOptions] = mockedUseQuery.mock.calls.at(-1) ?? [];
+
+    if (!hasQueryFn(queryOptions)) {
+      throw new Error('Expected useQuery to receive a queryFn');
+    }
+
+    return queryOptions.queryFn();
+  };
+
+  it('returns backend order when altinnNugetVersion is at least 8.9.0.225', async () => {
+    const documents = await runQueryFn('8.9.0.225');
+
+    expect(documents.map((doc) => doc.filename)).toEqual(['zeta.pdf', 'alpha.pdf']);
+  });
+
+  it.each<[string | undefined]>([['8.9.0.224'], [undefined]])(
+    'sorts by filename when altinnNugetVersion is %s',
+    async (altinnNugetVersion) => {
+      const documents = await runQueryFn(altinnNugetVersion);
+
+      expect(documents.map((doc) => doc.filename)).toEqual(['alpha.pdf', 'zeta.pdf']);
+    },
+  );
+});
diff --git a/src/layout/SigningDocumentList/api.ts b/src/layout/SigningDocumentList/api.ts
index 38ec7dcc09..fd52e400e7 100644
--- a/src/layout/SigningDocumentList/api.ts
+++ b/src/layout/SigningDocumentList/api.ts
@@ -6,6 +6,7 @@ import { DataTypeReference } from 'src/utils/attachmentsUtils';
 import { httpGet } from 'src/utils/network/sharedNetworking';
 import { appPath } from 'src/utils/urls/appUrlHelper';
 import { makeUrlRelativeIfSameDomain } from 'src/utils/urls/urlHelper';
+import { backendSupportsSigningDocumentOrdering } from 'src/utils/versioning/versions';
 
 const signingDocumentSchema = z
   .object({
@@ -33,18 +34,23 @@ export type SigningDocument = z.infer<typeof signingDocumentSchema>;
 export function useDocumentList(
   instanceOwnerPartyId: string | undefined,
   instanceGuid: string | undefined,
+  altinnNugetVersion: string | undefined,
 ): UseQueryResult<SigningDocument[]> {
+  const backendHandlesOrdering = backendSupportsSigningDocumentOrdering(altinnNugetVersion);
+
   return useQuery({
-    queryKey: ['signingDocumentList', instanceOwnerPartyId, instanceGuid],
+    queryKey: ['signingDocumentList', instanceOwnerPartyId, instanceGuid, backendHandlesOrdering],
     queryFn: async () => {
       const url = `${appPath}/instances/${instanceOwnerPartyId}/${instanceGuid}/signing/data-elements`;
 
       const response = await httpGet(url);
 
-      return z
-        .object({ dataElements: z.array(signingDocumentSchema) })
-        .parse(response)
-        .dataElements.toSorted((a, b) => (a.filename ?? '').localeCompare(b.filename ?? ''));
+      const dataElements = z.object({ dataElements: z.array(signingDocumentSchema) }).parse(response).dataElements;
+
+      if (backendHandlesOrdering) {
+        return dataElements;
+      }
+      return dataElements.toSorted((a, b) => (a.filename ?? '').localeCompare(b.filename ?? ''));
     },
     staleTime: 1000 * 60 * 30, // 30 minutes
     refetchOnMount: 'always',
diff --git a/src/utils/versioning/versions.ts b/src/utils/versioning/versions.ts
index 097b7b891d..bc903faebd 100644
--- a/src/utils/versioning/versions.ts
+++ b/src/utils/versioning/versions.ts
@@ -9,6 +9,7 @@ export const FEATURE_VERSION_MAP = {
   PDF_PREVIEW_BUTTON: '8.5.0.157',
   APP_LANGUAGES_IN_ANONYMOUS: '8.5.6.180',
   SET_TAGS_ENDPOINT: '8.8.0.215',
+  BACKEND_ORDERED_SIGNING_DOCUMENTS: '8.9.0.225',
 } as const;
 
 type AppFeature = keyof typeof FEATURE_VERSION_MAP;
@@ -67,3 +68,7 @@ export function appSupportsIncrementalValidationFeatures(currentNugetVersion: st
 export function appSupportsSetTagsEndpoint(currentNugetVersion: string | undefined) {
   return isFeatureSupported({ feature: 'SET_TAGS_ENDPOINT', currentNugetVersion });
 }
+
+export function backendSupportsSigningDocumentOrdering(currentNugetVersion: string | undefined) {
+  return isFeatureSupported({ feature: 'BACKEND_ORDERED_SIGNING_DOCUMENTS', currentNugetVersion });
+}