diff --git a/src/app.ts b/src/app.ts
index 8b0a54f..1faee0d 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -5,7 +5,7 @@ import secureSession from '@fastify/secure-session';
 import type { AppConfig } from './config.js';
 import { registerErrorHandler } from './error-handler.js';
 import { createNotifier } from './lib/notifications.js';
-import { ensureUploadDir, removeFile } from './lib/storage.js';
+import { ensureUploadDir, hidePartSuffix, removeFile } from './lib/storage.js';
 import { createUploadSessionStore } from './lib/upload-sessions.js';
 import { createOidcClient, type OidcClient } from './oidc.js';
 import { authRoutes } from './routes/auth.js';
@@ -46,7 +46,7 @@ export async function buildApp(
   const uploadSessions = createUploadSessionStore((session) => {
     removeFile(session.partPath).catch((error: unknown) => {
       app.log.warn(
-        { err: error },
+        { err: error instanceof Error ? hidePartSuffix(error) : error, file: session.storedName },
         "Impossible de supprimer le fichier partiel d'une session expirée",
       );
     });
@@ -62,6 +62,8 @@ export async function buildApp(
     await notifier.close();
   });
 
+  app.decorateRequest('uploadFile', undefined);
+
   const refreshSession = createSessionRefresher(config.session.maxAgeSeconds);
   app.addHook('preHandler', (request, _reply, hookDone) => {
     refreshSession(request);
diff --git a/src/error-handler.ts b/src/error-handler.ts
index 29e25f9..bca4099 100644
--- a/src/error-handler.ts
+++ b/src/error-handler.ts
@@ -1,6 +1,7 @@
 import type { FastifyError, FastifyInstance, FastifyRequest } from 'fastify';
 
 import { AppError, ClientAbortedError } from './errors.js';
+import { hidePartSuffix } from './lib/storage.js';
 import { getSessionUser } from './session.js';
 
 interface ErrorBody {
@@ -40,7 +41,7 @@ function resolveError(
     return { status: 400, body: { error: 'ValidationError', message: error.message } };
   }
 
-  request.log.error({ err: error }, 'Erreur non gérée');
+  request.log.error({ err: hidePartSuffix(error) }, 'Erreur non gérée');
   return { status: 500, body: { error: 'InternalServerError', message: 'Erreur interne' } };
 }
 
@@ -76,7 +77,7 @@ export function registerErrorHandler(app: FastifyInstance): void {
 
     // Annulation/pause côté client : comportement normal, pas un échec à signaler.
     if (error instanceof ClientAbortedError) {
-      request.log.debug({ err: error }, 'Requête interrompue par le client');
+      request.log.debug({ err: hidePartSuffix(error) }, 'Requête interrompue par le client');
       return;
     }
 
@@ -88,6 +89,7 @@ export function registerErrorHandler(app: FastifyInstance): void {
         method: request.method,
         path,
         target: requestedTarget(request),
+        file: request.uploadFile,
         user: getSessionUser(request)?.sub,
       });
     }
diff --git a/src/fastify.d.ts b/src/fastify.d.ts
index a0b9df7..b2ec6d6 100644
--- a/src/fastify.d.ts
+++ b/src/fastify.d.ts
@@ -17,6 +17,13 @@ declare module 'fastify' {
   }
 }
 
+declare module 'fastify' {
+  interface FastifyRequest {
+    /** Nom du fichier concerné par la requête d'upload, une fois connu (voir `bindUploadFile`). */
+    uploadFile: string | undefined;
+  }
+}
+
 declare module '@fastify/secure-session' {
   interface SessionData {
     user?: SessionUser;
diff --git a/src/lib/notifications.ts b/src/lib/notifications.ts
index 5473b03..837af9e 100644
--- a/src/lib/notifications.ts
+++ b/src/lib/notifications.ts
@@ -29,6 +29,8 @@ export interface UploadFailedInput {
   method: string;
   path: string;
   target?: string;
+  /** Nom du fichier concerné (nom déposé, jamais celui du `.part`), s'il est connu. */
+  file?: string;
   user?: string;
 }
 
@@ -70,7 +72,8 @@ function uploadSummary(input: UploadCompletedInput): string {
 }
 
 function errorSummary(input: UploadFailedInput): string {
-  return `⚠️ Échec d'upload (${String(input.statusCode)}) : ${input.message} [${input.method} ${input.path}]`;
+  const file = input.file !== undefined ? ` — fichier « ${input.file} »` : '';
+  return `⚠️ Échec d'upload (${String(input.statusCode)}) : ${input.message}${file} [${input.method} ${input.path}]`;
 }
 
 function uploadBody(input: UploadCompletedInput): Record<string, unknown> {
@@ -101,6 +104,7 @@ function errorBody(input: UploadFailedInput): Record<string, unknown> {
     method: input.method,
     path: input.path,
     ...(input.target !== undefined ? { target: input.target } : {}),
+    ...(input.file !== undefined ? { file: input.file } : {}),
     ...(input.user !== undefined ? { user: input.user } : {}),
     text: summary,
     content: summary,
diff --git a/src/lib/request-file.ts b/src/lib/request-file.ts
new file mode 100644
index 0000000..e5737cb
--- /dev/null
+++ b/src/lib/request-file.ts
@@ -0,0 +1,10 @@
+import type { FastifyRequest } from 'fastify';
+
+/**
+ * Associe le nom du fichier déposé à la requête : il est ajouté à tous ses logs
+ * (`file`) et repris dans la notification webhook d'échec.
+ */
+export function bindUploadFile(request: FastifyRequest, file: string): void {
+  request.uploadFile = file;
+  request.log = request.log.child({ file });
+}
diff --git a/src/lib/storage.ts b/src/lib/storage.ts
index a39e43a..6e8be5f 100644
--- a/src/lib/storage.ts
+++ b/src/lib/storage.ts
@@ -48,6 +48,22 @@ export interface SaveFileParams {
   placement?: FilePlacement;
 }
 
+/** Suffixe du fichier partiel d'un upload fragmenté (`<fichier>.mediadrop-part`). */
+export const PART_SUFFIX = '.mediadrop-part';
+
+/**
+ * Retire le suffixe du fichier partiel du message et de la pile d'une erreur (les erreurs
+ * du système de fichiers citent le chemin du `.part`) : les logs affichent le nom du
+ * fichier déposé. Modifie et renvoie l'erreur reçue.
+ */
+export function hidePartSuffix<T extends Error>(error: T): T {
+  error.message = error.message.replaceAll(PART_SUFFIX, '');
+  if (error.stack !== undefined) {
+    error.stack = error.stack.replaceAll(PART_SUFFIX, '');
+  }
+  return error;
+}
+
 const MAX_BASE_LENGTH = 60;
 /** Tampon d'écriture large : meilleur débit sur les très gros fichiers. */
 const WRITE_HIGH_WATER_MARK = 1 << 20;
diff --git a/src/routes/upload-chunked.ts b/src/routes/upload-chunked.ts
index f1228b4..466eb04 100644
--- a/src/routes/upload-chunked.ts
+++ b/src/routes/upload-chunked.ts
@@ -8,10 +8,12 @@ import { isAllowedMedia } from '../lib/media-types.js';
 import {
   createEmptyFile,
   finalizeFile,
+  PART_SUFFIX,
   removeFile,
   resolveDestination,
   writeChunkAt,
 } from '../lib/storage.js';
+import { bindUploadFile } from '../lib/request-file.js';
 import { resolvePlacement, resolveTarget } from '../lib/targets.js';
 import type { UploadSession } from '../lib/upload-sessions.js';
 import { getSessionUser, requireSession } from '../session.js';
@@ -19,7 +21,6 @@ import { getSessionUser, requireSession } from '../session.js';
 const MIN_CHUNK = 1024 * 1024;
 const MAX_CHUNK = 32 * 1024 * 1024;
 const DEFAULT_CHUNK = 16 * 1024 * 1024;
-const PART_SUFFIX = '.mediadrop-part';
 
 interface InitBody {
   target?: unknown;
@@ -87,6 +88,8 @@ export const chunkedUploadRoutes: FastifyPluginCallback = (app, _options, done)
     async (request, reply): Promise<InitResponse> => {
       const body = (request.body ?? {}) as InitBody;
       const query = (request.query ?? {}) as InitQuery;
+      const originalName = nonEmptyString(body.name, 'fichier');
+      bindUploadFile(request, originalName);
       // Le client web transmet `target` et `path` dans la query (comme `POST /upload`) ;
       // le corps JSON reste accepté.
       const target = resolveTarget(cfg.targets, query.target ?? body.target);
@@ -104,7 +107,6 @@ export const chunkedUploadRoutes: FastifyPluginCallback = (app, _options, done)
       const chunkSize = clampChunkSize(body.chunkSize);
       const chunkCount = Math.ceil(totalSize / chunkSize);
 
-      const originalName = nonEmptyString(body.name, 'fichier');
       const { storedName, destination } = await resolveDestination({
         targetDir: target.dir,
         originalName,
@@ -144,6 +146,7 @@ export const chunkedUploadRoutes: FastifyPluginCallback = (app, _options, done)
     async (request): Promise<ChunkAck> => {
       const { id, index } = request.params as { id: string; index: string };
       const session = app.uploadSessions.use(id);
+      bindUploadFile(request, session.storedName);
 
       const chunkIndex = Number(index);
       if (!Number.isInteger(chunkIndex) || chunkIndex < 0 || chunkIndex >= session.chunkCount) {
@@ -168,6 +171,7 @@ export const chunkedUploadRoutes: FastifyPluginCallback = (app, _options, done)
     async (request, reply): Promise<CompleteResponse> => {
       const { id } = request.params as { id: string };
       const session = app.uploadSessions.use(id);
+      bindUploadFile(request, session.storedName);
 
       if (session.received.size !== session.chunkCount) {
         throw new ValidationError('Upload incomplet : des morceaux manquent');
diff --git a/src/routes/upload.ts b/src/routes/upload.ts
index 3d8c182..ac80e0d 100644
--- a/src/routes/upload.ts
+++ b/src/routes/upload.ts
@@ -3,6 +3,7 @@ import type { FastifyPluginCallback } from 'fastify';
 import type { DropTarget } from '../config.js';
 import { ValidationError } from '../errors.js';
 import { isAllowedMedia, type MimePolicy } from '../lib/media-types.js';
+import { bindUploadFile } from '../lib/request-file.js';
 import { resolvePlacement, resolveTarget } from '../lib/targets.js';
 import { getSessionUser, requireSession } from '../session.js';
 import { saveFile, type StoredFile } from '../lib/storage.js';
@@ -78,6 +79,7 @@ export const uploadRoutes: FastifyPluginCallback = (app, _options, done) => {
       if (!part) {
         throw new ValidationError(`Aucun fichier reçu dans le champ « ${FIELD_NAME} »`);
       }
+      bindUploadFile(request, part.filename);
       if (part.fieldname !== FIELD_NAME) {
         part.file.resume();
         throw new ValidationError(`Le fichier doit être envoyé dans le champ « ${FIELD_NAME} »`);
diff --git a/tests/stream-errors.test.ts b/tests/stream-errors.test.ts
index 386a827..63ffe19 100644
--- a/tests/stream-errors.test.ts
+++ b/tests/stream-errors.test.ts
@@ -6,12 +6,26 @@ import {
   PayloadTooLargeError,
   ValidationError,
 } from '../src/errors.js';
-import { normalizeStreamError } from '../src/lib/storage.js';
+import { hidePartSuffix, normalizeStreamError } from '../src/lib/storage.js';
 
 function withCode(code: string): Error {
   return Object.assign(new Error('boom'), { code });
 }
 
+describe('hidePartSuffix', () => {
+  it('retire le suffixe .mediadrop-part du message et de la pile', () => {
+    const error = new Error("ENOENT: open '/data/videos/clip.mp4.mediadrop-part'");
+    const result = hidePartSuffix(error);
+    expect(result).toBe(error);
+    expect(result.message).toBe("ENOENT: open '/data/videos/clip.mp4'");
+    expect(result.stack).not.toContain('.mediadrop-part');
+  });
+
+  it('laisse intact un message sans suffixe', () => {
+    expect(hidePartSuffix(new Error('autre')).message).toBe('autre');
+  });
+});
+
 describe('normalizeStreamError', () => {
   it('conserve les AppError telles quelles', () => {
     const error = new ValidationError('x');
diff --git a/tests/webhooks-integration.test.ts b/tests/webhooks-integration.test.ts
index 5969856..19851b6 100644
--- a/tests/webhooks-integration.test.ts
+++ b/tests/webhooks-integration.test.ts
@@ -155,9 +155,39 @@ describe('webhooks — intégration', () => {
       method: 'POST',
       path: '/upload',
       target: 'videos',
+      file: 'x.zip',
     });
   });
 
+  it('`error` d’un upload fragmenté : nom du fichier déposé, jamais celui du .part', async () => {
+    const init = await fetch(`${baseUrl}/upload/init`, {
+      method: 'POST',
+      headers: { 'content-type': 'application/json', cookie },
+      body: JSON.stringify({
+        target: 'videos',
+        path: 'a/clip.mp4',
+        name: 'clip.mp4',
+        size: MIB,
+        type: 'video/mp4',
+        chunkSize: MIB,
+      }),
+    });
+    const { id } = (await init.json()) as { id: string };
+    const res = await fetch(`${baseUrl}/upload/${id}/9`, {
+      method: 'PUT',
+      headers: { 'content-type': 'application/octet-stream', cookie },
+      body: new Uint8Array(10),
+    });
+    expect(res.status).toBe(400);
+
+    await app.close();
+    const errors = receiver.calls.filter((c) => c.event === 'error');
+    expect(errors).toHaveLength(1);
+    expect(errors[0]!.body).toMatchObject({ statusCode: 400, file: 'a/clip.mp4' });
+    expect(JSON.stringify(errors[0]!.body)).not.toContain('.mediadrop-part');
+    expect(String(errors[0]!.body.text)).toContain('a/clip.mp4');
+  });
+
   it('notifie `upload` (via: chunked) après finalisation fragmentée', async () => {
     const data = randomBytes(200 * 1024);
     const init = await fetch(`${baseUrl}/upload/init`, {