diff --git a/fern/apis/fdr/definition/commons.yml b/fern/apis/fdr/definition/commons.yml
index 0a356df49f..a980cac2fc 100644
--- a/fern/apis/fdr/definition/commons.yml
+++ b/fern/apis/fdr/definition/commons.yml
@@ -50,9 +50,11 @@ errors:
 
   UserNotInOrgError:
     status-code: 403
+    type: string
 
   DomainBelongsToAnotherOrgError:
     status-code: 403
+    type: string
 
   InternalError:
     status-code: 500
diff --git a/packages/fdr-sdk/src/client/generated/api/resources/api/resources/v1/resources/register/client/registerApiDefinition.ts b/packages/fdr-sdk/src/client/generated/api/resources/api/resources/v1/resources/register/client/registerApiDefinition.ts
index cfcb90bf10..03a41aba13 100644
--- a/packages/fdr-sdk/src/client/generated/api/resources/api/resources/v1/resources/register/client/registerApiDefinition.ts
+++ b/packages/fdr-sdk/src/client/generated/api/resources/api/resources/v1/resources/register/client/registerApiDefinition.ts
@@ -18,6 +18,7 @@ export declare namespace Error {
 
     interface UserNotInOrgError {
         error: "UserNotInOrgError";
+        content: string;
     }
 
     interface _Unknown {
@@ -27,7 +28,7 @@ export declare namespace Error {
 
     interface _Visitor<_Result> {
         unauthorizedError: (value: string) => _Result;
-        userNotInOrgError: () => _Result;
+        userNotInOrgError: (value: string) => _Result;
         _other: (value: core.Fetcher.Error) => _Result;
     }
 }
@@ -40,8 +41,9 @@ export const Error = {
         };
     },
 
-    userNotInOrgError: (): FernRegistry.api.v1.register.registerApiDefinition.Error.UserNotInOrgError => {
+    userNotInOrgError: (value: string): FernRegistry.api.v1.register.registerApiDefinition.Error.UserNotInOrgError => {
         return {
+            content: value,
             error: "UserNotInOrgError",
         };
     },
@@ -61,7 +63,7 @@ export const Error = {
             case "UnauthorizedError":
                 return visitor.unauthorizedError(value.content);
             case "UserNotInOrgError":
-                return visitor.userNotInOrgError();
+                return visitor.userNotInOrgError(value.content);
             default:
                 return visitor._other(value as any);
         }
diff --git a/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v1/resources/write/client/finishDocsRegister.ts b/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v1/resources/write/client/finishDocsRegister.ts
index ff5f533e53..959842e63b 100644
--- a/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v1/resources/write/client/finishDocsRegister.ts
+++ b/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v1/resources/write/client/finishDocsRegister.ts
@@ -19,6 +19,7 @@ export declare namespace Error {
 
     interface UserNotInOrgError {
         error: "UserNotInOrgError";
+        content: string;
     }
 
     interface DocsRegistrationIdNotFound {
@@ -32,7 +33,7 @@ export declare namespace Error {
 
     interface _Visitor<_Result> {
         unauthorizedError: (value: string) => _Result;
-        userNotInOrgError: () => _Result;
+        userNotInOrgError: (value: string) => _Result;
         docsRegistrationIdNotFound: () => _Result;
         _other: (value: core.Fetcher.Error) => _Result;
     }
@@ -46,8 +47,9 @@ export const Error = {
         };
     },
 
-    userNotInOrgError: (): FernRegistry.docs.v1.write.finishDocsRegister.Error.UserNotInOrgError => {
+    userNotInOrgError: (value: string): FernRegistry.docs.v1.write.finishDocsRegister.Error.UserNotInOrgError => {
         return {
+            content: value,
             error: "UserNotInOrgError",
         };
     },
@@ -73,7 +75,7 @@ export const Error = {
             case "UnauthorizedError":
                 return visitor.unauthorizedError(value.content);
             case "UserNotInOrgError":
-                return visitor.userNotInOrgError();
+                return visitor.userNotInOrgError(value.content);
             case "DocsRegistrationIdNotFound":
                 return visitor.docsRegistrationIdNotFound();
             default:
diff --git a/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v2/resources/write/client/finishDocsRegister.ts b/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v2/resources/write/client/finishDocsRegister.ts
index 4dfaabb38b..3160f4f7b3 100644
--- a/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v2/resources/write/client/finishDocsRegister.ts
+++ b/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v2/resources/write/client/finishDocsRegister.ts
@@ -19,6 +19,7 @@ export declare namespace Error {
 
     interface UserNotInOrgError {
         error: "UserNotInOrgError";
+        content: string;
     }
 
     interface DocsRegistrationIdNotFound {
@@ -32,7 +33,7 @@ export declare namespace Error {
 
     interface _Visitor<_Result> {
         unauthorizedError: (value: string) => _Result;
-        userNotInOrgError: () => _Result;
+        userNotInOrgError: (value: string) => _Result;
         docsRegistrationIdNotFound: () => _Result;
         _other: (value: core.Fetcher.Error) => _Result;
     }
@@ -46,8 +47,9 @@ export const Error = {
         };
     },
 
-    userNotInOrgError: (): FernRegistry.docs.v2.write.finishDocsRegister.Error.UserNotInOrgError => {
+    userNotInOrgError: (value: string): FernRegistry.docs.v2.write.finishDocsRegister.Error.UserNotInOrgError => {
         return {
+            content: value,
             error: "UserNotInOrgError",
         };
     },
@@ -73,7 +75,7 @@ export const Error = {
             case "UnauthorizedError":
                 return visitor.unauthorizedError(value.content);
             case "UserNotInOrgError":
-                return visitor.userNotInOrgError();
+                return visitor.userNotInOrgError(value.content);
             case "DocsRegistrationIdNotFound":
                 return visitor.docsRegistrationIdNotFound();
             default:
diff --git a/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v2/resources/write/client/startDocsPreviewRegister.ts b/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v2/resources/write/client/startDocsPreviewRegister.ts
index 3ba39c6c8d..46cc9c6794 100644
--- a/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v2/resources/write/client/startDocsPreviewRegister.ts
+++ b/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v2/resources/write/client/startDocsPreviewRegister.ts
@@ -25,6 +25,7 @@ export declare namespace Error {
 
     interface UserNotInOrgError {
         error: "UserNotInOrgError";
+        content: string;
     }
 
     interface InvalidDomainError {
@@ -39,7 +40,7 @@ export declare namespace Error {
     interface _Visitor<_Result> {
         unauthorizedError: (value: string) => _Result;
         unavailableError: (value: string) => _Result;
-        userNotInOrgError: () => _Result;
+        userNotInOrgError: (value: string) => _Result;
         invalidDomainError: () => _Result;
         _other: (value: core.Fetcher.Error) => _Result;
     }
@@ -60,8 +61,9 @@ export const Error = {
         };
     },
 
-    userNotInOrgError: (): FernRegistry.docs.v2.write.startDocsPreviewRegister.Error.UserNotInOrgError => {
+    userNotInOrgError: (value: string): FernRegistry.docs.v2.write.startDocsPreviewRegister.Error.UserNotInOrgError => {
         return {
+            content: value,
             error: "UserNotInOrgError",
         };
     },
@@ -91,7 +93,7 @@ export const Error = {
             case "UnavailableError":
                 return visitor.unavailableError(value.content);
             case "UserNotInOrgError":
-                return visitor.userNotInOrgError();
+                return visitor.userNotInOrgError(value.content);
             case "InvalidDomainError":
                 return visitor.invalidDomainError();
             default:
diff --git a/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v2/resources/write/client/startDocsRegister.ts b/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v2/resources/write/client/startDocsRegister.ts
index 0ac590b409..681024fec6 100644
--- a/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v2/resources/write/client/startDocsRegister.ts
+++ b/packages/fdr-sdk/src/client/generated/api/resources/docs/resources/v2/resources/write/client/startDocsRegister.ts
@@ -27,6 +27,7 @@ export declare namespace Error {
 
     interface UserNotInOrgError {
         error: "UserNotInOrgError";
+        content: string;
     }
 
     interface InvalidDomainError {
@@ -39,6 +40,7 @@ export declare namespace Error {
 
     interface DomainBelongsToAnotherOrgError {
         error: "DomainBelongsToAnotherOrgError";
+        content: string;
     }
 
     interface _Unknown {
@@ -49,10 +51,10 @@ export declare namespace Error {
     interface _Visitor<_Result> {
         unauthorizedError: (value: string) => _Result;
         unavailableError: (value: string) => _Result;
-        userNotInOrgError: () => _Result;
+        userNotInOrgError: (value: string) => _Result;
         invalidDomainError: () => _Result;
         invalidCustomDomainError: () => _Result;
-        domainBelongsToAnotherOrgError: () => _Result;
+        domainBelongsToAnotherOrgError: (value: string) => _Result;
         _other: (value: core.Fetcher.Error) => _Result;
     }
 }
@@ -72,8 +74,9 @@ export const Error = {
         };
     },
 
-    userNotInOrgError: (): FernRegistry.docs.v2.write.startDocsRegister.Error.UserNotInOrgError => {
+    userNotInOrgError: (value: string): FernRegistry.docs.v2.write.startDocsRegister.Error.UserNotInOrgError => {
         return {
+            content: value,
             error: "UserNotInOrgError",
         };
     },
@@ -90,12 +93,14 @@ export const Error = {
         };
     },
 
-    domainBelongsToAnotherOrgError:
-        (): FernRegistry.docs.v2.write.startDocsRegister.Error.DomainBelongsToAnotherOrgError => {
-            return {
-                error: "DomainBelongsToAnotherOrgError",
-            };
-        },
+    domainBelongsToAnotherOrgError: (
+        value: string
+    ): FernRegistry.docs.v2.write.startDocsRegister.Error.DomainBelongsToAnotherOrgError => {
+        return {
+            content: value,
+            error: "DomainBelongsToAnotherOrgError",
+        };
+    },
 
     _unknown: (fetcherError: core.Fetcher.Error): FernRegistry.docs.v2.write.startDocsRegister.Error._Unknown => {
         return {
@@ -114,13 +119,13 @@ export const Error = {
             case "UnavailableError":
                 return visitor.unavailableError(value.content);
             case "UserNotInOrgError":
-                return visitor.userNotInOrgError();
+                return visitor.userNotInOrgError(value.content);
             case "InvalidDomainError":
                 return visitor.invalidDomainError();
             case "InvalidCustomDomainError":
                 return visitor.invalidCustomDomainError();
             case "DomainBelongsToAnotherOrgError":
-                return visitor.domainBelongsToAnotherOrgError();
+                return visitor.domainBelongsToAnotherOrgError(value.content);
             default:
                 return visitor._other(value as any);
         }
diff --git a/packages/fdr-sdk/src/client/generated/api/resources/snippets/client/get.ts b/packages/fdr-sdk/src/client/generated/api/resources/snippets/client/get.ts
index 2a28ce111c..49fea55f33 100644
--- a/packages/fdr-sdk/src/client/generated/api/resources/snippets/client/get.ts
+++ b/packages/fdr-sdk/src/client/generated/api/resources/snippets/client/get.ts
@@ -25,6 +25,7 @@ export declare namespace Error {
 
     interface UserNotInOrgError {
         error: "UserNotInOrgError";
+        content: string;
     }
 
     interface UnavailableError {
@@ -69,7 +70,7 @@ export declare namespace Error {
 
     interface _Visitor<_Result> {
         unauthorizedError: (value: string) => _Result;
-        userNotInOrgError: () => _Result;
+        userNotInOrgError: (value: string) => _Result;
         unavailableError: (value: string) => _Result;
         apiIdRequiredError: (value: string) => _Result;
         orgIdRequiredError: (value: string) => _Result;
@@ -89,8 +90,9 @@ export const Error = {
         };
     },
 
-    userNotInOrgError: (): FernRegistry.snippets.get.Error.UserNotInOrgError => {
+    userNotInOrgError: (value: string): FernRegistry.snippets.get.Error.UserNotInOrgError => {
         return {
+            content: value,
             error: "UserNotInOrgError",
         };
     },
@@ -159,7 +161,7 @@ export const Error = {
             case "UnauthorizedError":
                 return visitor.unauthorizedError(value.content);
             case "UserNotInOrgError":
-                return visitor.userNotInOrgError();
+                return visitor.userNotInOrgError(value.content);
             case "UnavailableError":
                 return visitor.unavailableError(value.content);
             case "ApiIdRequiredError":
diff --git a/packages/fdr-sdk/src/client/generated/api/resources/snippets/client/load.ts b/packages/fdr-sdk/src/client/generated/api/resources/snippets/client/load.ts
index ea34cea929..b5a6fd1d04 100644
--- a/packages/fdr-sdk/src/client/generated/api/resources/snippets/client/load.ts
+++ b/packages/fdr-sdk/src/client/generated/api/resources/snippets/client/load.ts
@@ -25,6 +25,7 @@ export declare namespace Error {
 
     interface UserNotInOrgError {
         error: "UserNotInOrgError";
+        content: string;
     }
 
     interface UnavailableError {
@@ -69,7 +70,7 @@ export declare namespace Error {
 
     interface _Visitor<_Result> {
         unauthorizedError: (value: string) => _Result;
-        userNotInOrgError: () => _Result;
+        userNotInOrgError: (value: string) => _Result;
         unavailableError: (value: string) => _Result;
         invalidPageError: (value: string) => _Result;
         apiIdRequiredError: (value: string) => _Result;
@@ -89,8 +90,9 @@ export const Error = {
         };
     },
 
-    userNotInOrgError: (): FernRegistry.snippets.load.Error.UserNotInOrgError => {
+    userNotInOrgError: (value: string): FernRegistry.snippets.load.Error.UserNotInOrgError => {
         return {
+            content: value,
             error: "UserNotInOrgError",
         };
     },
@@ -159,7 +161,7 @@ export const Error = {
             case "UnauthorizedError":
                 return visitor.unauthorizedError(value.content);
             case "UserNotInOrgError":
-                return visitor.userNotInOrgError();
+                return visitor.userNotInOrgError(value.content);
             case "UnavailableError":
                 return visitor.unavailableError(value.content);
             case "InvalidPageError":
diff --git a/packages/fdr-sdk/src/client/generated/api/resources/snippetsFactory/client/createSnippetsForSdk.ts b/packages/fdr-sdk/src/client/generated/api/resources/snippetsFactory/client/createSnippetsForSdk.ts
index 59b01d54f2..72ee6830ae 100644
--- a/packages/fdr-sdk/src/client/generated/api/resources/snippetsFactory/client/createSnippetsForSdk.ts
+++ b/packages/fdr-sdk/src/client/generated/api/resources/snippetsFactory/client/createSnippetsForSdk.ts
@@ -20,6 +20,7 @@ export declare namespace Error {
 
     interface UserNotInOrgError {
         error: "UserNotInOrgError";
+        content: string;
     }
 
     interface OrgIdNotFound {
@@ -39,7 +40,7 @@ export declare namespace Error {
 
     interface _Visitor<_Result> {
         unauthorizedError: (value: string) => _Result;
-        userNotInOrgError: () => _Result;
+        userNotInOrgError: (value: string) => _Result;
         orgIdNotFound: (value: string) => _Result;
         sdkNotFound: (value: string) => _Result;
         _other: (value: core.Fetcher.Error) => _Result;
@@ -54,8 +55,9 @@ export const Error = {
         };
     },
 
-    userNotInOrgError: (): FernRegistry.snippetsFactory.createSnippetsForSdk.Error.UserNotInOrgError => {
+    userNotInOrgError: (value: string): FernRegistry.snippetsFactory.createSnippetsForSdk.Error.UserNotInOrgError => {
         return {
+            content: value,
             error: "UserNotInOrgError",
         };
     },
@@ -89,7 +91,7 @@ export const Error = {
             case "UnauthorizedError":
                 return visitor.unauthorizedError(value.content);
             case "UserNotInOrgError":
-                return visitor.userNotInOrgError();
+                return visitor.userNotInOrgError(value.content);
             case "OrgIdNotFound":
                 return visitor.orgIdNotFound(value.content);
             case "SDKNotFound":
diff --git a/servers/fdr/src/api/generated/api/resources/commons/errors/DomainBelongsToAnotherOrgError.d.ts b/servers/fdr/src/api/generated/api/resources/commons/errors/DomainBelongsToAnotherOrgError.d.ts
index f7ee862178..399ce3eac0 100644
--- a/servers/fdr/src/api/generated/api/resources/commons/errors/DomainBelongsToAnotherOrgError.d.ts
+++ b/servers/fdr/src/api/generated/api/resources/commons/errors/DomainBelongsToAnotherOrgError.d.ts
@@ -4,6 +4,7 @@
 import * as errors from "../../../../errors";
 import express from "express";
 export declare class DomainBelongsToAnotherOrgError extends errors.FernRegistryError {
-    constructor();
+    private readonly body;
+    constructor(body: string);
     send(res: express.Response): Promise<void>;
 }
diff --git a/servers/fdr/src/api/generated/api/resources/commons/errors/DomainBelongsToAnotherOrgError.js b/servers/fdr/src/api/generated/api/resources/commons/errors/DomainBelongsToAnotherOrgError.js
index 7239b257d9..f5e809d7ff 100644
--- a/servers/fdr/src/api/generated/api/resources/commons/errors/DomainBelongsToAnotherOrgError.js
+++ b/servers/fdr/src/api/generated/api/resources/commons/errors/DomainBelongsToAnotherOrgError.js
@@ -12,13 +12,14 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
 };
 import * as errors from "../../../../errors";
 export class DomainBelongsToAnotherOrgError extends errors.FernRegistryError {
-    constructor() {
+    constructor(body) {
         super("DomainBelongsToAnotherOrgError");
+        this.body = body;
         Object.setPrototypeOf(this, DomainBelongsToAnotherOrgError.prototype);
     }
     send(res) {
         return __awaiter(this, void 0, void 0, function* () {
-            res.sendStatus(403);
+            res.status(403).json(this.body);
         });
     }
 }
diff --git a/servers/fdr/src/api/generated/api/resources/commons/errors/UserNotInOrgError.d.ts b/servers/fdr/src/api/generated/api/resources/commons/errors/UserNotInOrgError.d.ts
index cefda7ff37..413a8cb616 100644
--- a/servers/fdr/src/api/generated/api/resources/commons/errors/UserNotInOrgError.d.ts
+++ b/servers/fdr/src/api/generated/api/resources/commons/errors/UserNotInOrgError.d.ts
@@ -4,6 +4,7 @@
 import * as errors from "../../../../errors";
 import express from "express";
 export declare class UserNotInOrgError extends errors.FernRegistryError {
-    constructor();
+    private readonly body;
+    constructor(body: string);
     send(res: express.Response): Promise<void>;
 }
diff --git a/servers/fdr/src/api/generated/api/resources/commons/errors/UserNotInOrgError.js b/servers/fdr/src/api/generated/api/resources/commons/errors/UserNotInOrgError.js
index 1ce87b8308..1400fd16e4 100644
--- a/servers/fdr/src/api/generated/api/resources/commons/errors/UserNotInOrgError.js
+++ b/servers/fdr/src/api/generated/api/resources/commons/errors/UserNotInOrgError.js
@@ -12,13 +12,14 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
 };
 import * as errors from "../../../../errors";
 export class UserNotInOrgError extends errors.FernRegistryError {
-    constructor() {
+    constructor(body) {
         super("UserNotInOrgError");
+        this.body = body;
         Object.setPrototypeOf(this, UserNotInOrgError.prototype);
     }
     send(res) {
         return __awaiter(this, void 0, void 0, function* () {
-            res.sendStatus(403);
+            res.status(403).json(this.body);
         });
     }
 }
diff --git a/servers/fdr/src/controllers/docs/v2/getDocsWriteV2Service.ts b/servers/fdr/src/controllers/docs/v2/getDocsWriteV2Service.ts
index 0d87f20c1d..74daa85981 100644
--- a/servers/fdr/src/controllers/docs/v2/getDocsWriteV2Service.ts
+++ b/servers/fdr/src/controllers/docs/v2/getDocsWriteV2Service.ts
@@ -52,7 +52,7 @@ export function getDocsWriteV2Service(app: FdrApplication): DocsV2WriteService {
                 req.body.orgId,
             );
             if (!hasOwnership) {
-                throw new FdrAPI.DomainBelongsToAnotherOrgError();
+                throw new FdrAPI.DomainBelongsToAnotherOrgError("Domain belongs to another org");
             }
 
             const docsRegistrationId = uuidv4();
diff --git a/servers/fdr/src/services/auth/AuthService.ts b/servers/fdr/src/services/auth/AuthService.ts
index a2456566f8..1508d80bb2 100644
--- a/servers/fdr/src/services/auth/AuthService.ts
+++ b/servers/fdr/src/services/auth/AuthService.ts
@@ -96,7 +96,7 @@ export class AuthServiceImpl implements AuthService {
         }
         const belongsToOrg = response.body;
         if (!belongsToOrg) {
-            throw new FdrAPI.UserNotInOrgError();
+            throw new FdrAPI.UserNotInOrgError("User does not belong to organization");
         }
     }