diff --git a/src/constants/endpoints.js b/src/constants/endpoints.js
index 8d010784..039bb464 100644
--- a/src/constants/endpoints.js
+++ b/src/constants/endpoints.js
@@ -193,7 +193,7 @@ const endpoints = Object.freeze({
     },
     DuplicateSearch: {
         // eslint-disable-next-line max-len
-        url: (accountNumber, policyNumber, dateOfLoss) => `${ORDER_BASE_URL}/duplicate-check/${accountNumber}/${policyNumber}/${dateOfLoss}`,
+        url: (parentAccountNumber, policyNumber, dateOfLoss) => `${ORDER_BASE_URL}/duplicate-check/${parentAccountNumber}/${policyNumber}/${dateOfLoss}`,
         method: 'GET'
     },
     FinalDeductible: {
diff --git a/src/helpers/cookie-helper.js b/src/helpers/cookie-helper.js
index 9b5107ad..7faaa8c4 100644
--- a/src/helpers/cookie-helper.js
+++ b/src/helpers/cookie-helper.js
@@ -125,7 +125,7 @@ export function updateOrCreateISSCookie() {
         ReferralNumber: store.order.referralNumber,
         ReferralDate: store.order.referralDate,
         ReferralCorrelationId: store.order.referralCorrelationId,
-        ReferralParentAccountNumber: store.order.accountNumber,
+        ReferralParentAccountNumber: store.order.parentAccountNumber,
         SavedSessionId: store.applicationUser.savedSessionId
     });
 }
diff --git a/src/iss-components/cart-dropdown/__snapshots__/cart-dropdown.spec.js.snap b/src/iss-components/cart-dropdown/__snapshots__/cart-dropdown.spec.js.snap
index 0a8190fa..e7f7abed 100644
--- a/src/iss-components/cart-dropdown/__snapshots__/cart-dropdown.spec.js.snap
+++ b/src/iss-components/cart-dropdown/__snapshots__/cart-dropdown.spec.js.snap
@@ -55,6 +55,7 @@ Object {
     "loadedFromDupeCheck": null,
     "loadedSessionClearedPreviousData": null,
     "originalDeductible": null,
+    "parentAccountNumber": null,
     "payment": Object {
       "creditCardToken": Object {
         "authCode": null,
diff --git a/src/layouts/policy-holder-details/policy-holder-details.spec.js b/src/layouts/policy-holder-details/policy-holder-details.spec.js
index 9e035baf..c1f1f998 100644
--- a/src/layouts/policy-holder-details/policy-holder-details.spec.js
+++ b/src/layouts/policy-holder-details/policy-holder-details.spec.js
@@ -160,7 +160,6 @@ describe('navigation', () => {
 
         useMainStore().order.policy.policyNumber = 'p_0001';
         useMainStore().order.policy.dateOfLoss = '2022-01-28';
-        useMainStore().order.accountNumber = '00000';
 
         // Act
 
diff --git a/src/layouts/welcome-page/welcome-page.vue b/src/layouts/welcome-page/welcome-page.vue
index 153c7a09..f91ec2db 100644
--- a/src/layouts/welcome-page/welcome-page.vue
+++ b/src/layouts/welcome-page/welcome-page.vue
@@ -228,7 +228,7 @@ export default {
         const mainStore = useMainStore();
 
         // Set order account number from the issConfig.
-        mainStore.order.accountNumber = mainStore.issConfig.parentAccountNumber;
+        mainStore.order.parentAccountNumber = mainStore.issConfig.parentAccountNumber;
 
         return { mainStore };
     },
diff --git a/src/store/index.js b/src/store/index.js
index 2bcee233..06e3b423 100644
--- a/src/store/index.js
+++ b/src/store/index.js
@@ -199,6 +199,7 @@ export const getDefaultState = () => ({
             jobMaxMinutes: null,
             jobMinMinutes: null
         },
+        parentAccountNumber: null,
         referralNumber: null,
         referralDate: null,
         referralCorrelationId: '00000000-0000-0000-0000-000000000000',
@@ -400,7 +401,7 @@ export const useMainStore = defineStore({
                 funnelServices: s.order.serviceLocation.state,
                 funnelServiceZipCode: s.order.serviceLocation.zipCode,
                 funnelServiceZipCodeCtu: ctuToUse,
-                funnelParentAccountNumber: s.order.accountNumber,
+                funnelParentAccountNumber: s.order.parentAccountNumber,
                 funnelProviderNumber: s.order.serviceLocation.provider.providerNumber,
                 funnelIsCoverageVerified: s.order.payment.insuranceCoverage.isVerified,
                 funnelHasRecalibrationPart: getHasRecalibrationPart(s),
@@ -548,7 +549,7 @@ export const useMainStore = defineStore({
                     method: endpoints.CoveragePolicyInfo.method,
                     endpoint: endpoints.CoveragePolicyInfo.url,
                     payload: {
-                        accountNumber: order.accountNumber?.toString(),
+                        accountNumber: order.parentAccountNumber?.toString(),
                         policyNumber: policy.policyNumber,
                         dateOfLoss: policy.dateOfLoss,
                         zipCode: policy.policyZipCode,
@@ -1060,7 +1061,7 @@ export const useMainStore = defineStore({
             const lineItemsQueryString = getLineItemQueryString(availableLineItems, 'lineItems');
 
             let queryString =
-            `ParentAccountNumber=${this.order.accountNumber}`
+            `ParentAccountNumber=${this.order.parentAccountNumber}`
             + `&BillToAccountNumber=${this.billToNumberToUse}`
             + `&CTU=${ctuToUse}`
             + `&Deductible=${deductibleToUse}`
@@ -1098,7 +1099,7 @@ export const useMainStore = defineStore({
 
             return globalMethods.callHttpClient({
                 method: endpoints.GetMobileFeePart.method,
-                endpoint: `${endpoints.GetMobileFeePart.url}/${damageType}/${this.order.accountNumber}/${this.billToNumberToUse}`
+                endpoint: `${endpoints.GetMobileFeePart.url}/${damageType}/${this.order.parentAccountNumber}/${this.billToNumberToUse}`
             });
         },
 
@@ -2027,7 +2028,7 @@ export const useMainStore = defineStore({
             if (appointmentType === AppointmentTypeStrings.MOBILE
                 || appointmentType === AppointmentTypeStrings.MOBILE_NOT_ITAC_AND_NOT_NOCOMP) {
                 queryString =
-                `ParentAccountNumber=${this.order.accountNumber}`
+                `ParentAccountNumber=${this.order.parentAccountNumber}`
                 + `&BillToAccountNumber=${this.billToNumberToUse}`
                 + `&ProviderNumber=${providerNumber}`
                 + `&AppointmentType=${appointmentType}`
@@ -2037,7 +2038,7 @@ export const useMainStore = defineStore({
                 + `${lineItemsQueryString}`;
             } else {
                 queryString =
-                `ParentAccountNumber=${this.order.accountNumber}`
+                `ParentAccountNumber=${this.order.parentAccountNumber}`
                 + `&BillToAccountNumber=${this.billToNumberToUse}`
                 + `&ProviderNumber=${providerNumber}`
                 + `&AppointmentType=${appointmentType}`
diff --git a/src/store/store.spec.js b/src/store/store.spec.js
index 666a924a..021ec1f0 100644
--- a/src/store/store.spec.js
+++ b/src/store/store.spec.js
@@ -1229,12 +1229,12 @@ describe('Store', () => {
             });
             it('calls api with expected data', async () => {
                 // Arrange
-                const accountNumber = getRandomString(6, 6);
+                const parentAccountNumber = getRandomString(6, 6);
                 const policyNumber = getRandomString(6, 6);
                 const dateOfLoss = getRandomString(6, 6);
                 const zipCode = getRandomString(6, 6);
                 const referralCorrelationId = getRandomString(6, 6);
-                store.order.accountNumber = accountNumber;
+                store.order.parentAccountNumber = parentAccountNumber;
                 store.order.policy.policyNumber = policyNumber;
                 store.order.policy.dateOfLoss = dateOfLoss;
                 store.order.policy.policyZipCode = zipCode;
@@ -1247,7 +1247,7 @@ describe('Store', () => {
                 // Asserts
                 expect(globalMethods.callHttpClient).toHaveBeenCalledWith(expect.objectContaining({
                     payload: expect.objectContaining({
-                        accountNumber,
+                        accountNumber: parentAccountNumber,
                         policyNumber,
                         dateOfLoss,
                         zipCode,
@@ -1679,7 +1679,7 @@ describe('Store', () => {
                     }
                 ];
                 const referralCorrelationId = getRandomGuid();
-                const accountNumber = getRandomString(6, 6);
+                const parentAccountNumber = getRandomString(6, 6);
                 const endorsements = [];
                 const manualGlassNames = [location];
                 const policyState = getRandomString(2, 2);
@@ -1698,7 +1698,7 @@ describe('Store', () => {
                 const isItac = getRandomBoolean();
 
                 store.order.referralCorrelationId = referralCorrelationId;
-                store.issConfig.parentAccountNumber = accountNumber;
+                store.issConfig.parentAccountNumber = parentAccountNumber;
                 store.order.currentDeductible = currentDeductible;
                 store.order.originalDeductible = originalDeductible;
                 store.order.policy.noCoverage = noCoverage;
@@ -1726,7 +1726,7 @@ describe('Store', () => {
                     endpoint: endpoints.FinalDeductible.url,
                     payload: ({
                         referralCorrelationId,
-                        accountNumber,
+                        accountNumber: parentAccountNumber,
                         endorsements,
                         manualGlassNames,
                         policyState,
@@ -1762,7 +1762,7 @@ describe('Store', () => {
                     }
                 ];
                 const referralCorrelationId = getRandomGuid();
-                const accountNumber = getRandomString(6, 6);
+                const parentAccountNumber = getRandomString(6, 6);
                 const manualGlassNames = [location];
                 const policyState = getRandomString(2, 2);
                 const status = getRandomString(6, 8);
@@ -1800,7 +1800,7 @@ describe('Store', () => {
                 const isItac = false;
 
                 store.order.referralCorrelationId = referralCorrelationId;
-                store.issConfig.parentAccountNumber = accountNumber;
+                store.issConfig.parentAccountNumber = parentAccountNumber;
                 store.order.currentDeductible = currentDeductible;
                 store.order.originalDeductible = originalDeductible;
                 store.order.policy.noCoverage = noCoverage;
@@ -1830,7 +1830,7 @@ describe('Store', () => {
                     endpoint: endpoints.FinalDeductible.url,
                     payload: ({
                         referralCorrelationId,
-                        accountNumber,
+                        accountNumber: parentAccountNumber,
                         endorsements: expected,
                         manualGlassNames,
                         policyState,