diff --git a/packages/checkout/sdk/src/widgets/definitions/events/sale.ts b/packages/checkout/sdk/src/widgets/definitions/events/sale.ts
index 6c5d2281d0..fd9648edff 100644
--- a/packages/checkout/sdk/src/widgets/definitions/events/sale.ts
+++ b/packages/checkout/sdk/src/widgets/definitions/events/sale.ts
@@ -36,6 +36,21 @@ export type SaleSuccess = {
   [key: string]: unknown;
 };
 
+/**
+ * Vendor error from custom authorization or quote webhooks.
+ * Present when the failure is due to a vendor-specific rejection.
+ */
+export type VendorError = {
+  code: string;
+  message?: string;
+};
+
+export type SaleFailedError = {
+  type?: string;
+  data?: { vendorError?: VendorError };
+  [key: string]: unknown;
+};
+
 /**
  * Type representing a Sale Widget with type FAILURE.
  * @property {string} reason
@@ -45,8 +60,8 @@ export type SaleSuccess = {
 export type SaleFailed = {
   /** The reason why sale transaction failed. */
   reason: string;
-  /** The error object. */
-  error: Record<string, unknown>;
+  /** Error details. Will include vendorError if the failure is due to a vendor-specific rejection. */
+  error: SaleFailedError;
   /** The timestamp of the failed swap. */
   timestamp: number;
   /** Chosen payment method */
diff --git a/packages/checkout/widgets-lib/src/context/view-context/SaleViewContextTypes.ts b/packages/checkout/widgets-lib/src/context/view-context/SaleViewContextTypes.ts
index 0197505a7c..bca8e28e8b 100644
--- a/packages/checkout/widgets-lib/src/context/view-context/SaleViewContextTypes.ts
+++ b/packages/checkout/widgets-lib/src/context/view-context/SaleViewContextTypes.ts
@@ -43,6 +43,7 @@ interface SaleFailView extends ViewType {
   data?: {
     errorType: SaleErrorTypes;
     transactionHash?: string;
+    vendorError?: { code: string; message?: string };
     [key: string]: unknown;
   };
 }
diff --git a/packages/checkout/widgets-lib/src/locales/en.json b/packages/checkout/widgets-lib/src/locales/en.json
index b1bddf0436..0f74ee9bd5 100644
--- a/packages/checkout/widgets-lib/src/locales/en.json
+++ b/packages/checkout/widgets-lib/src/locales/en.json
@@ -499,6 +499,10 @@
           "primaryAction": "Try again",
           "secondaryAction": "Cancel"
         },
+        "SALE_AUTHORIZATION_REJECTED": {
+          "description": "Sorry, your purchase could not be completed.",
+          "secondaryAction": "Dismiss"
+        },
         "DEFAULT_ERROR": {
           "description": "Sorry, something went wrong. Please try again.",
           "primaryAction": "Try again",
diff --git a/packages/checkout/widgets-lib/src/locales/ja.json b/packages/checkout/widgets-lib/src/locales/ja.json
index 1aaed4ea55..f1dd4e2d8f 100644
--- a/packages/checkout/widgets-lib/src/locales/ja.json
+++ b/packages/checkout/widgets-lib/src/locales/ja.json
@@ -459,6 +459,10 @@
           "primaryAction": "もう一度試す",
           "secondaryAction": "キャンセル"
         },
+        "SALE_AUTHORIZATION_REJECTED": {
+          "description": "申し訳ございません。購入を完了できませんでした。",
+          "secondaryAction": "閉じる"
+        },
         "DEFAULT_ERROR": {
           "description": "申し訳ありませんが、何かがうまくいかなかったようです。もう一度お試しください。",
           "primaryAction": "もう一度試す",
diff --git a/packages/checkout/widgets-lib/src/locales/ko.json b/packages/checkout/widgets-lib/src/locales/ko.json
index a06e044f8c..366a33e8e5 100644
--- a/packages/checkout/widgets-lib/src/locales/ko.json
+++ b/packages/checkout/widgets-lib/src/locales/ko.json
@@ -456,6 +456,10 @@
           "primaryAction": "다시 시도",
           "secondaryAction": "취소"
         },
+        "SALE_AUTHORIZATION_REJECTED": {
+          "description": "죄송합니다, 구매를 완료할 수 없습니다.",
+          "secondaryAction": "닫기"
+        },
         "DEFAULT_ERROR": {
           "description": "죄송합니다, 문제가 발생했습니다. 다시 시도하세요.",
           "primaryAction": "다시 시도",
diff --git a/packages/checkout/widgets-lib/src/locales/zh.json b/packages/checkout/widgets-lib/src/locales/zh.json
index 0252b7b050..f389943b9f 100644
--- a/packages/checkout/widgets-lib/src/locales/zh.json
+++ b/packages/checkout/widgets-lib/src/locales/zh.json
@@ -456,6 +456,10 @@
           "primaryAction": "再试一次",
           "secondaryAction": "取消"
         },
+        "SALE_AUTHORIZATION_REJECTED": {
+          "description": "抱歉，您的购买无法完成。",
+          "secondaryAction": "关闭"
+        },
         "DEFAULT_ERROR": {
           "description": "抱歉，出了点问题。请再试一次。",
           "primaryAction": "再试一次",
diff --git a/packages/checkout/widgets-lib/src/widgets/sale/SaleWidget.tsx b/packages/checkout/widgets-lib/src/widgets/sale/SaleWidget.tsx
index e56271234e..ae9a4a54c4 100644
--- a/packages/checkout/widgets-lib/src/widgets/sale/SaleWidget.tsx
+++ b/packages/checkout/widgets-lib/src/widgets/sale/SaleWidget.tsx
@@ -159,6 +159,7 @@ export default function SaleWidget(props: SaleWidgetProps) {
               biomeTheme={biomeTheme}
               errorType={viewState.view.data?.errorType}
               transactionHash={viewState.view.data?.transactionHash}
+              vendorMessage={viewState.view.data?.vendorError?.message}
               blockExplorerLink={BlockExplorerService.getTransactionLink(
                 chainId.current as ChainId,
                 viewState.view.data?.transactionHash!,
diff --git a/packages/checkout/widgets-lib/src/widgets/sale/context/SaleContextProvider.tsx b/packages/checkout/widgets-lib/src/widgets/sale/context/SaleContextProvider.tsx
index a20547f59e..2a765a6dcf 100644
--- a/packages/checkout/widgets-lib/src/widgets/sale/context/SaleContextProvider.tsx
+++ b/packages/checkout/widgets-lib/src/widgets/sale/context/SaleContextProvider.tsx
@@ -87,7 +87,7 @@ type SaleContextValues = SaleContextProps & {
     paymentMethod?: SalePaymentTypes | undefined,
     data?: Record<string, unknown>
   ) => void;
-  goToErrorView: (type: SaleErrorTypes, data?: Record<string, string>) => void;
+  goToErrorView: (type: SaleErrorTypes, data?: Record<string, unknown>) => void;
   goToSuccessView: (data?: Record<string, unknown>) => void;
   fundingRoutes: FundingRoute[];
   disabledPaymentTypes: SalePaymentTypes[];
@@ -284,14 +284,21 @@ export function SaleContextProvider(props: {
   );
 
   const goToErrorView = useCallback(
-    (errorType: SaleErrorTypes, data: Record<string, string> = {}) => {
+    (
+      errorType: SaleErrorTypes,
+      data: Record<string, unknown> & { vendorError?: { code: string; message?: string } } = {},
+    ) => {
       errorRetries.current += 1;
       if (errorRetries.current > MAX_ERROR_RETRIES) {
         errorRetries.current = 0;
         setPaymentMethod(undefined);
       }
 
-      trackError('commerce', 'saleError', new Error(errorType), data);
+      const { vendorError, ...errorData } = data;
+      trackError('commerce', 'saleError', new Error(errorType), {
+        ...errorData,
+        ...(vendorError ? { vendorCode: vendorError.code, vendorMessage: vendorError.message || '' } : {}),
+      });
 
       viewDispatch({
         payload: {
diff --git a/packages/checkout/widgets-lib/src/widgets/sale/hooks/useQuoteOrder.ts b/packages/checkout/widgets-lib/src/widgets/sale/hooks/useQuoteOrder.ts
index 3aa958f49e..da473e5b49 100644
--- a/packages/checkout/widgets-lib/src/widgets/sale/hooks/useQuoteOrder.ts
+++ b/packages/checkout/widgets-lib/src/widgets/sale/hooks/useQuoteOrder.ts
@@ -26,7 +26,7 @@ export const defaultOrderQuote: OrderQuote = {
 
 export type ConfigError = {
   type: SaleErrorTypes;
-  data?: Record<string, string>;
+  data?: Record<string, unknown>;
 };
 
 export const useQuoteOrder = ({
@@ -93,6 +93,16 @@ export const useQuoteOrder = ({
         });
 
         if (!response.ok) {
+          if (response.status === 400) {
+            const { code, message } = await response.json();
+            setOrderQuoteError({
+              type: SaleErrorTypes.SALE_AUTHORIZATION_REJECTED,
+              data: {
+                vendorError: { code: code || '', message: message || undefined },
+              },
+            });
+            return;
+          }
           throw new Error(`${response.status} - ${response.statusText}`);
         }
 
diff --git a/packages/checkout/widgets-lib/src/widgets/sale/hooks/useSignOrder.ts b/packages/checkout/widgets-lib/src/widgets/sale/hooks/useSignOrder.ts
index d4d7a8435b..ef7ded33df 100644
--- a/packages/checkout/widgets-lib/src/widgets/sale/hooks/useSignOrder.ts
+++ b/packages/checkout/widgets-lib/src/widgets/sale/hooks/useSignOrder.ts
@@ -291,11 +291,17 @@ export const useSignOrder = (input: SignOrderInput) => {
 
         const { ok, status } = response;
         if (!ok) {
-          const { code } = (await response.json()) as SignApiError;
+          const { code, message } = (await response.json()) as SignApiError;
           let errorType: SaleErrorTypes;
+          let errorData: { code: string; message: string } | undefined;
+
           switch (status) {
             case 400:
-              errorType = SaleErrorTypes.SERVICE_BREAKDOWN;
+              errorType = SaleErrorTypes.SALE_AUTHORIZATION_REJECTED;
+              errorData = {
+                code,
+                message,
+              };
               break;
             case 404:
               if (code === 'insufficient_stock') {
@@ -312,7 +318,7 @@ export const useSignOrder = (input: SignOrderInput) => {
               throw new Error('Unknown error');
           }
 
-          setSignError({ type: errorType });
+          setSignError({ type: errorType, data: errorData });
           return undefined;
         }
 
diff --git a/packages/checkout/widgets-lib/src/widgets/sale/types.ts b/packages/checkout/widgets-lib/src/widgets/sale/types.ts
index 77e0632e85..35376a9372 100644
--- a/packages/checkout/widgets-lib/src/widgets/sale/types.ts
+++ b/packages/checkout/widgets-lib/src/widgets/sale/types.ts
@@ -59,7 +59,9 @@ export type SignOrderInput = {
 
 export type SignOrderError = {
   type: SaleErrorTypes;
-  data?: Record<string, string>;
+  data?:
+  | Record<string, string>
+  | { vendorError: { code: string; message: string } };
 };
 
 export type ExecutedTransaction = {
@@ -85,6 +87,7 @@ export enum SaleErrorTypes {
   WALLET_REJECTED_NO_FUNDS = 'WALLET_REJECTED_NO_FUNDS',
   WALLET_POPUP_BLOCKED = 'WALLET_POPUP_BLOCKED',
   FUNDING_ROUTE_EXECUTE_ERROR = 'FUNDING_ROUTE_EXECUTE_ERROR',
+  SALE_AUTHORIZATION_REJECTED = 'SALE_AUTHORIZATION_REJECTED',
 }
 
 export type OrderQuoteCurrency = {
diff --git a/packages/checkout/widgets-lib/src/widgets/sale/views/SaleErrorView.tsx b/packages/checkout/widgets-lib/src/widgets/sale/views/SaleErrorView.tsx
index 08cf53f0fa..e7adb2eaa2 100644
--- a/packages/checkout/widgets-lib/src/widgets/sale/views/SaleErrorView.tsx
+++ b/packages/checkout/widgets-lib/src/widgets/sale/views/SaleErrorView.tsx
@@ -36,6 +36,7 @@ type SaleErrorViewProps = {
   errorType: SaleErrorTypes | undefined;
   transactionHash?: string;
   blockExplorerLink?: string;
+  vendorMessage?: string;
 };
 
 export function SaleErrorView({
@@ -43,6 +44,7 @@ export function SaleErrorView({
   transactionHash,
   blockExplorerLink,
   errorType,
+  vendorMessage,
 }: SaleErrorViewProps) {
   const { t } = useTranslation();
   const {
@@ -198,6 +200,13 @@ export function SaleErrorView({
       onSecondaryActionClick: closeWidget,
       statusType: StatusType.INFORMATION,
     },
+    [SaleErrorTypes.SALE_AUTHORIZATION_REJECTED]: {
+      onSecondaryActionClick: closeWidget,
+      statusType: StatusType.INFORMATION,
+      statusIconStyles: {
+        fill: biomeTheme.color.status.fatal.dim,
+      },
+    },
     [SaleErrorTypes.INVALID_PARAMETERS]: {
       onSecondaryActionClick: closeWidget,
       statusType: StatusType.ALERT,
@@ -222,11 +231,13 @@ export function SaleErrorView({
       ? t(`views.SALE_FAIL.errors.${currentErrorType}.secondaryAction`)
       : t(`views.SALE_FAIL.errors.${SaleErrorTypes.DEFAULT}.secondaryAction`);
 
+    const useVendorMessage = currentErrorType === SaleErrorTypes.SALE_AUTHORIZATION_REJECTED
+      && vendorMessage;
+
     return {
       headingText: t('views.PAYMENT_METHODS.handover.error.heading'),
-      subheadingText: t(
-        `views.SALE_FAIL.errors.${currentErrorType}.description`,
-      ),
+      subheadingText: useVendorMessage
+        || t(`views.SALE_FAIL.errors.${currentErrorType}.description`),
       primaryButtonText: t(
         `views.SALE_FAIL.errors.${currentErrorType}.primaryAction`,
       ),