diff --git a/frontend-admin/src/api/api_delivery.ts b/frontend-admin/src/api/api_delivery.ts
index 615f0286..dcea78a7 100644
--- a/frontend-admin/src/api/api_delivery.ts
+++ b/frontend-admin/src/api/api_delivery.ts
@@ -142,11 +142,12 @@ export const updateDeliveryStatus = async (
     status: string,
     latitude: number,
     longitude: number,
+    notes?: string,
 ): Promise<{ success: boolean; message?: string; error?: string }> => {
     try {
         const { data } = await apiClient.put(
             `${API}/deliveries/${deliveryId}/status`,
-            { status, latitude, longitude },
+            { status, latitude, longitude, ...(notes ? { notes } : {}) },
         );
         return { success: true, message: data.message };
     } catch (error: any) {
diff --git a/frontend-admin/src/screens/delivery/DashboardScreen.tsx b/frontend-admin/src/screens/delivery/DashboardScreen.tsx
index 61f4b52f..b62c5235 100644
--- a/frontend-admin/src/screens/delivery/DashboardScreen.tsx
+++ b/frontend-admin/src/screens/delivery/DashboardScreen.tsx
@@ -19,6 +19,7 @@ import {
     Modal,
     StatusBar,
     ScrollView,
+    TextInput,
 } from "react-native";
 import Geolocation from "@react-native-community/geolocation";
 import { Ionicons } from "@expo/vector-icons";
@@ -105,6 +106,11 @@ export default function DashboardScreen() {
 
     const [detailsDelivery, setDetailsDelivery] =
         useState<EnrichedDelivery | null>(null);
+    const [cancelModal, setCancelModal] = useState<{
+        visible: boolean;
+        deliveryId: number | null;
+        reason: string;
+    }>({ visible: false, deliveryId: null, reason: "" });
 
     const STATUS_COLORS: Record<string, string> = useMemo(
         () => ({
@@ -483,6 +489,26 @@ export default function DashboardScreen() {
         }
     };
 
+    const handleCancelDelivery = async () => {
+        if (!cancelModal.deliveryId) return;
+        const lat = lastCoords?.lat || 0;
+        const lng = lastCoords?.lng || 0;
+        const res = await updateDeliveryStatus(
+            cancelModal.deliveryId,
+            "cancelled",
+            lat,
+            lng,
+            cancelModal.reason || "Client absent",
+        );
+        setCancelModal({ visible: false, deliveryId: null, reason: "" });
+        if (res.success) {
+            showSuccess("Succès", "Livraison annulée");
+            loadData();
+        } else {
+            showError("Erreur", res.error || "Erreur");
+        }
+    };
+
     const openNavigation = (address: string) => {
         const encoded = encodeURIComponent(address);
         const wazeApp = `waze://?q=${encoded}&navigate=yes`;
@@ -673,14 +699,24 @@ export default function DashboardScreen() {
                     />
                 )}
                 {item.status === "arrived" && (
-                    <Button
-                        title="Terminer la livraison"
-                        onPress={() => handleCompleteDelivery(item.id)}
-                        style={{
-                            marginTop: spacing.s,
-                            backgroundColor: colors.accent,
-                        }}
-                    />
+                    <View style={{ flexDirection: "row", gap: spacing.s, marginTop: spacing.s }}>
+                        <Button
+                            title="Terminer"
+                            onPress={() => handleCompleteDelivery(item.id)}
+                            style={{ flex: 1, backgroundColor: colors.accent }}
+                        />
+                        <Button
+                            title="Annuler"
+                            onPress={() =>
+                                setCancelModal({
+                                    visible: true,
+                                    deliveryId: item.id,
+                                    reason: "",
+                                })
+                            }
+                            style={{ flex: 1, backgroundColor: colors.danger }}
+                        />
+                    </View>
                 )}
             </Card>
         );
@@ -1418,6 +1454,29 @@ export default function DashboardScreen() {
                     fontSize: fontSize.sm,
                     fontWeight: "600",
                 },
+
+                cancelInput: {
+                    borderWidth: 1,
+                    borderColor: colors.border,
+                    borderRadius: borderRadius.m,
+                    padding: spacing.m,
+                    color: colors.textWhite,
+                    backgroundColor: colors.bgSecondary,
+                    minHeight: 80,
+                    textAlignVertical: "top",
+                    marginBottom: spacing.m,
+                },
+                cancelConfirmBtn: {
+                    backgroundColor: colors.danger,
+                    borderRadius: borderRadius.m,
+                    padding: spacing.m,
+                    alignItems: "center",
+                },
+                cancelConfirmText: {
+                    color: colors.textWhite,
+                    fontWeight: "700",
+                    fontSize: fontSize.md,
+                },
             }),
         [colors],
     );
@@ -1720,6 +1779,33 @@ export default function DashboardScreen() {
                 ListHeaderComponent={renderHeader()}
             />
 
+            {/* Modal annulation livraison */}
+            <DetailsModal
+                visible={cancelModal.visible}
+                onClose={() =>
+                    setCancelModal({ visible: false, deliveryId: null, reason: "" })
+                }
+                title="Annuler la livraison"
+                icon="close-circle-outline"
+            >
+                <TextInput
+                    style={styles.cancelInput}
+                    placeholder="Motif (ex: client absent)..."
+                    placeholderTextColor={colors.textMuted}
+                    value={cancelModal.reason}
+                    onChangeText={(t) =>
+                        setCancelModal((prev) => ({ ...prev, reason: t }))
+                    }
+                    multiline
+                />
+                <TouchableOpacity
+                    style={styles.cancelConfirmBtn}
+                    onPress={handleCancelDelivery}
+                >
+                    <Text style={styles.cancelConfirmText}>Confirmer l'annulation</Text>
+                </TouchableOpacity>
+            </DetailsModal>
+
             <AlertModal
                 visible={alert.visible}
                 type={alert.type}