diff --git a/.env.example b/.env.example
index 5f3da7c1f..4d409e798 100644
--- a/.env.example
+++ b/.env.example
@@ -80,6 +80,8 @@ NEXT_PRIVATE_SIGNING_CSC_OAUTH_CLIENT_SECRET=
 NEXT_PRIVATE_SIGNING_CSC_SIGNATURE_LEVEL=
 # OPTIONAL: Comma-separated list of timestamp authority URLs for PDF signing (enables LTV and archival timestamps).
 NEXT_PRIVATE_SIGNING_TIMESTAMP_AUTHORITY=
+# OPTIONAL: Reason to embed in PDF signatures. Defaults to "Signed by Documenso".
+NEXT_PRIVATE_SIGNING_REASON=
 # OPTIONAL: Contact info to embed in PDF signatures. Defaults to the webapp URL.
 NEXT_PUBLIC_SIGNING_CONTACT_INFO=
 # OPTIONAL: Set to "true" to use the legacy adbe.pkcs7.detached subfilter instead of ETSI.CAdES.detached.
diff --git a/packages/lib/constants/app.test.ts b/packages/lib/constants/app.test.ts
new file mode 100644
index 000000000..41d1cf5b6
--- /dev/null
+++ b/packages/lib/constants/app.test.ts
@@ -0,0 +1,27 @@
+import { afterEach, describe, expect, it, vi } from 'vitest';
+
+import { NEXT_PRIVATE_SIGNING_REASON } from './app';
+
+describe('NEXT_PRIVATE_SIGNING_REASON', () => {
+  afterEach(() => {
+    vi.unstubAllEnvs();
+  });
+
+  it('defaults to the Documenso signing reason', () => {
+    vi.stubEnv('NEXT_PRIVATE_SIGNING_REASON', undefined);
+
+    expect(NEXT_PRIVATE_SIGNING_REASON()).toBe('Signed by Documenso');
+  });
+
+  it('uses the default for an empty signing reason', () => {
+    vi.stubEnv('NEXT_PRIVATE_SIGNING_REASON', '');
+
+    expect(NEXT_PRIVATE_SIGNING_REASON()).toBe('Signed by Documenso');
+  });
+
+  it('uses the configured signing reason verbatim', () => {
+    vi.stubEnv('NEXT_PRIVATE_SIGNING_REASON', 'Signed by Objective');
+
+    expect(NEXT_PRIVATE_SIGNING_REASON()).toBe('Signed by Objective');
+  });
+});
diff --git a/packages/lib/constants/app.ts b/packages/lib/constants/app.ts
index 17ded9d66..98dff4757 100644
--- a/packages/lib/constants/app.ts
+++ b/packages/lib/constants/app.ts
@@ -92,6 +92,7 @@ export const IS_AI_FEATURES_CONFIGURED = (): boolean => {
 export const NEXT_PRIVATE_USE_PLAYWRIGHT_PDF = () => env('NEXT_PRIVATE_USE_PLAYWRIGHT_PDF') === 'true';
 
 export const NEXT_PRIVATE_SIGNING_TIMESTAMP_AUTHORITY = () => env('NEXT_PRIVATE_SIGNING_TIMESTAMP_AUTHORITY');
+export const NEXT_PRIVATE_SIGNING_REASON = () => env('NEXT_PRIVATE_SIGNING_REASON') || 'Signed by Documenso';
 
 export const NEXT_PRIVATE_SIGNING_TRANSPORT = () => env('NEXT_PRIVATE_SIGNING_TRANSPORT') || 'local';
 
diff --git a/packages/signing/index.ts b/packages/signing/index.ts
index acb1c00bb..f60b26650 100644
--- a/packages/signing/index.ts
+++ b/packages/signing/index.ts
@@ -1,4 +1,5 @@
 import {
+  NEXT_PRIVATE_SIGNING_REASON,
   NEXT_PRIVATE_SIGNING_TRANSPORT,
   NEXT_PRIVATE_USE_LEGACY_SIGNING_SUBFILTER,
   NEXT_PUBLIC_SIGNING_CONTACT_INFO,
@@ -42,7 +43,7 @@ export const signPdf = async ({ pdf }: SignOptions) => {
 
   const { bytes } = await pdf.sign({
     signer,
-    reason: 'Signed by Documenso',
+    reason: NEXT_PRIVATE_SIGNING_REASON(),
     location: NEXT_PUBLIC_WEBAPP_URL(),
     contactInfo: NEXT_PUBLIC_SIGNING_CONTACT_INFO(),
     subFilter: NEXT_PRIVATE_USE_LEGACY_SIGNING_SUBFILTER() ? 'adbe.pkcs7.detached' : 'ETSI.CAdES.detached',
diff --git a/packages/tsconfig/process-env.d.ts b/packages/tsconfig/process-env.d.ts
index d02df2be0..31f98cabb 100644
--- a/packages/tsconfig/process-env.d.ts
+++ b/packages/tsconfig/process-env.d.ts
@@ -59,6 +59,7 @@ declare namespace NodeJS {
     NEXT_PRIVATE_SIGNING_CSC_OAUTH_CLIENT_SECRET?: string;
     NEXT_PRIVATE_SIGNING_CSC_SIGNATURE_LEVEL?: 'AES' | 'QES';
     NEXT_PRIVATE_SIGNING_TIMESTAMP_AUTHORITY?: string;
+    NEXT_PRIVATE_SIGNING_REASON?: string;
     NEXT_PUBLIC_SIGNING_CONTACT_INFO?: string;
     NEXT_PRIVATE_USE_LEGACY_SIGNING_SUBFILTER?: string;