diff --git a/addons/hr_expense/static/src/components/attachment_view.js b/addons/hr_expense/static/src/components/attachment_view.js
new file mode 100644
index 00000000000..cac1c86d888
--- /dev/null
+++ b/addons/hr_expense/static/src/components/attachment_view.js
@@ -0,0 +1,13 @@
+/** @odoo-module **/
+
+import { patch } from "@web/core/utils/patch";
+import { AttachmentView } from "@mail/core/common/attachment_view";
+
+patch(AttachmentView.prototype, {
+    get displayName() {
+        if (this.state.thread.model === 'hr.expense.sheet') {
+            return (this.state.thread.mainAttachment.res_name || this.state.thread.name) + ' - ' + this.state.thread.mainAttachment.filename;
+        }
+        return super.displayName;
+    }
+});
diff --git a/addons/hr_expense/static/src/scss/hr_expense.scss b/addons/hr_expense/static/src/scss/hr_expense.scss
index 22d7011d3ea..c308e997f37 100644
--- a/addons/hr_expense/static/src/scss/hr_expense.scss
+++ b/addons/hr_expense/static/src/scss/hr_expense.scss
@@ -23,8 +23,11 @@
     display: flex;
     justify-content: center;
     z-index: -1;
-}
 
+    img {
+        max-height: 100%;
+    }
+}
 .o_dropzone {
     width: 100%;
     height: 100%;
diff --git a/addons/hr_expense/views/hr_expense_views.xml b/addons/hr_expense/views/hr_expense_views.xml
index 1d49978fbe2..f1a7deb474d 100644
--- a/addons/hr_expense/views/hr_expense_views.xml
+++ b/addons/hr_expense/views/hr_expense_views.xml
@@ -849,7 +849,7 @@
                         </page>
                      </notebook>
                 </sheet>
-                <div class="o_attachment_preview"/>
+                <div class="o_attachment_preview o_center_attachment"/>
                 <div class="oe_chatter">
                     <field name="message_follower_ids"/>
                     <field name="activity_ids"/>
diff --git a/addons/mail/models/ir_attachment.py b/addons/mail/models/ir_attachment.py
index 2624eb8b942..b735a96a0a7 100644
--- a/addons/mail/models/ir_attachment.py
+++ b/addons/mail/models/ir_attachment.py
@@ -81,6 +81,7 @@ class IrAttachment(models.Model):
             'filename': attachment.name,
             'name': attachment.name,
             "size": attachment.file_size,
+            'res_name': attachment.res_name,
             'mimetype': 'application/octet-stream' if safari and attachment.mimetype and 'video' in attachment.mimetype else attachment.mimetype,
             'originThread': [('insert', {
                 'id': attachment.res_id,
diff --git a/addons/mail/static/src/core/common/attachment_model.js b/addons/mail/static/src/core/common/attachment_model.js
index d169cfe94a2..bf35db8d174 100644
--- a/addons/mail/static/src/core/common/attachment_model.js
+++ b/addons/mail/static/src/core/common/attachment_model.js
@@ -40,6 +40,7 @@ export class Attachment extends Record {
     mimetype;
     name;
     originThreadLocalId;
+    res_name;
     type;
     /** @type {string} */
     tmpUrl;
diff --git a/addons/mail/static/src/core/common/attachment_service.js b/addons/mail/static/src/core/common/attachment_service.js
index 534f87cc7b0..edf4238867f 100644
--- a/addons/mail/static/src/core/common/attachment_service.js
+++ b/addons/mail/static/src/core/common/attachment_service.js
@@ -34,6 +34,7 @@ export class AttachmentService {
             "accessToken",
             "tmpUrl",
             "message",
+            "res_name",
         ]);
         if (!("extension" in data) && data["name"]) {
             attachment.extension = attachment.name.split(".").pop();
diff --git a/addons/mail/static/src/core/common/attachment_view.js b/addons/mail/static/src/core/common/attachment_view.js
index cc933ba62dc..7be07e8b630 100644
--- a/addons/mail/static/src/core/common/attachment_view.js
+++ b/addons/mail/static/src/core/common/attachment_view.js
@@ -59,4 +59,8 @@ export class AttachmentView extends Component {
             model: props.threadModel,
         });
     }
+
+    get displayName() {
+        return this.state.thread.mainAttachment.filename;
+    }
 }
diff --git a/addons/mail/static/src/core/common/attachment_view.xml b/addons/mail/static/src/core/common/attachment_view.xml
index 1effb496c77..293bad23a10 100644
--- a/addons/mail/static/src/core/common/attachment_view.xml
+++ b/addons/mail/static/src/core/common/attachment_view.xml
@@ -4,7 +4,7 @@
     <t t-name="mail.AttachmentView">
         <div t-if="state.thread.attachmentsInWebClientView.length > 0" class="o-mail-Attachment">
             <t t-if="state.thread.mainAttachment">
-                <h3 t-if="!state.thread.mainAttachment.isPdf" class="mt0 mb8 ps-2 text-muted float-end"><t t-esc="state.thread.mainAttachment.filename"/></h3>
+                <h3 t-if="!state.thread.mainAttachment.isPdf" class="mt0 mb8 ps-2 text-muted text-center"><t t-esc="displayName"/></h3>
                 <div t-if="state.thread.mainAttachment.isImage" class="o-mail-Attachment-imgContainer">
                     <img id="attachment_img" class="img img-fluid d-block" t-att-src="state.thread.mainAttachment.defaultSource"/>
                 </div>