diff --git a/app/src/main/res/layout/fragment_about.xml b/app/src/main/res/layout/fragment_about.xml
index f09cd11b..a8b46d26 100644
--- a/app/src/main/res/layout/fragment_about.xml
+++ b/app/src/main/res/layout/fragment_about.xml
@@ -564,5 +564,63 @@
             </LinearLayout>
         </android.support.v7.widget.CardView>
 
+        <!-- thumbnails -->
+        <android.support.v7.widget.CardView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/activity_margin_small"
+            android:layout_marginBottom="@dimen/activity_margin_small"
+            style="?attr/cardStyle">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical" >
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:text="@string/about_title_thumbnail_disclaimer"/>
+
+                <LinearLayout
+                    android:orientation="vertical"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:paddingStart="@dimen/activity_margin_small"
+                    android:paddingTop="@dimen/activity_margin_small"
+                    android:paddingBottom="@dimen/activity_margin_small"
+                    android:background="?android:attr/selectableItemBackground"
+                    android:gravity="center_vertical" >
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:layout_marginBottom="@dimen/activity_margin_small"
+                        android:textAppearance="?android:attr/textAppearanceSmall"
+                        android:text="@string/about_thumbnails_disclaimer_no1" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:layout_marginBottom="@dimen/activity_margin_small"
+                        android:textAppearance="?android:attr/textAppearanceSmall"
+                        android:text="@string/about_thumbnails_disclaimer_no2" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:layout_marginBottom="@dimen/activity_margin_small"
+                        android:textAppearance="?android:attr/textAppearanceSmall"
+                        android:text="@string/about_thumbnails_disclaimer_no3" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="?android:attr/textAppearanceSmall"
+                        android:text="@string/about_thumbnails_disclaimer_no4" />
+                </LinearLayout>
+            </LinearLayout>
+        </android.support.v7.widget.CardView>
+
     </LinearLayout>
 </ScrollView>
diff --git a/app/src/main/res/values/strings_about.xml b/app/src/main/res/values/strings_about.xml
index a1aaca60..3a544f9d 100644
--- a/app/src/main/res/values/strings_about.xml
+++ b/app/src/main/res/values/strings_about.xml
@@ -33,6 +33,18 @@
     <string name="about_label_contributors">Contributors</string>
     <string name="about_label_translators">Translators</string>
 
+    <!-- Thumbnail disclaimer -->
+    <string name="about_title_thumbnail_disclaimer">Thumbnail disclaimer</string>
+
+    <string name="about_thumbnails_disclaimer_no1"><b>1.</b> All thumbnails are trademarks of their
+        respective owners.</string>
+    <string name="about_thumbnails_disclaimer_no2"><b>2.</b> The use of these trademarks does not
+        indicate endorsement of the trademark holder by andOTP, nor vice versa.</string>
+    <string name="about_thumbnails_disclaimer_no3"><b>3.</b> Thumbnails should only be used to
+        represent the company or product to which they refer.</string>
+    <string name="about_thumbnails_disclaimer_no4"><b>4. Please do not use thumbnails for any
+        purpose except to represent that particular brand or service.</b></string>
+
     <!-- Support -->
     <string name="about_title_support">Support development</string>