diff --git a/src/pages/Customer/Card/CustomerSummary.vue b/src/pages/Customer/Card/CustomerSummary.vue
index 8b5f0f2c2..62792a5c2 100644
--- a/src/pages/Customer/Card/CustomerSummary.vue
+++ b/src/pages/Customer/Card/CustomerSummary.vue
@@ -4,7 +4,7 @@ import { useRoute } from 'vue-router';
 import { useI18n } from 'vue-i18n';
 import VnUserLink from 'src/components/ui/VnUserLink.vue';
 
-import { toCurrency, toPercentage, toDate } from 'src/filters';
+import { toCurrency, toPercentage, toDate, dashOrCurrency } from 'src/filters';
 import CardSummary from 'components/ui/CardSummary.vue';
 import VnLv from 'src/components/ui/VnLv.vue';
 import VnLinkPhone from 'src/components/ui/VnLinkPhone.vue';
@@ -25,16 +25,16 @@ const $props = defineProps({
 const entityId = computed(() => $props.id || route.params.id);
 const customer = computed(() => summary.value.entity);
 const summary = ref();
-
+const defaulterAmount = computed(() => customer.value.defaulters[0]?.amount);
 const balanceDue = computed(() => {
-    return (
-        customer.value &&
-        customer.value.defaulters.length &&
-        customer.value.defaulters[0].amount
-    );
+    const amount = defaulterAmount.value;
+    if (!amount || amount < 0) {
+        return null;
+    }
+    return amount;
 });
 
-const balanceDueWarning = computed(() => (balanceDue.value ? 'negative' : ''));
+const balanceDueWarning = computed(() => (defaulterAmount.value ? 'negative' : ''));
 
 const claimRate = computed(() => {
     return customer.value.claimsRatio?.claimingRate ?? 0;
@@ -281,7 +281,7 @@ const sumRisk = ({ clientRisks }) => {
                 <VnLv
                     v-if="entity.defaulters"
                     :label="t('customer.summary.balanceDue')"
-                    :value="toCurrency(balanceDue)"
+                    :value="dashOrCurrency(balanceDue)()"
                     :class="balanceDueWarning"
                     :info="t('customer.summary.balanceDueInfo')"
                 />