diff --git a/src/store/index.js b/src/store/index.js
index a131748c..9d23d112 100644
--- a/src/store/index.js
+++ b/src/store/index.js
@@ -586,7 +586,7 @@ export const useMainStore = defineStore({
                     referralCorrelationId: order.referralCorrelationId,
                     referralNumber: order.referralNumber
                 };
-                // Clients (i.e. USAA) may sometimes use member number, which is just policy number by a different name
+                // Clients (i.e. USAA) may sometimes use member number in addition to a policy number
                 if (this.issConfig.useMemberNumber) {
                     payload.memberNumber = policy.memberNumber ?? policy.policyNumber;
                 }
@@ -620,7 +620,7 @@ export const useMainStore = defineStore({
                     order.policy.policyData = responsePolicy.policyData;
                     if (this.issConfig.useMemberNumber) {
                         if (!order.policy.memberNumber) {
-                            // We only do this once, otherwise we would overwrite the member number with the policy number on subsequent lookups.
+                            // We capture the member number (entered as policy number) once, so we don't overwrite it with returned policy number on subsequent lookups
                             order.policy.memberNumber = order.policy.policyNumber;
                         }
                         order.policy.policyNumber = responsePolicy.policyNumber;
@@ -722,7 +722,7 @@ export const useMainStore = defineStore({
                     fleetNumber: this.order.vehicle.fleetNumber,
                     fleetUnitNumber: this.order.vehicle.fleetUnitNumber
                 };
-                // Clients (i.e. USAA) may sometimes use member number, which is just policy number by a different name
+                // Clients (i.e. USAA) may sometimes use member number in addition to a policy number
                 if (this.issConfig.useMemberNumber) {
                     payload.memberNumber = this.order.policy.memberNumber ?? this.order.policy.policyNumber;
                 }
@@ -783,7 +783,7 @@ export const useMainStore = defineStore({
                 policyData: this.order.policy.policyData,
                 isItac: this.isITAC
             };
-            // Clients (i.e. USAA) may sometimes use member number, which is just policy number by a different name
+            // Clients (i.e. USAA) may sometimes use member number in addition to a policy number
             if (this.issConfig.useMemberNumber) {
                 payload.memberNumber = this.order.policy.memberNumber ?? this.order.policy.policyNumber;
             }
@@ -1835,7 +1835,6 @@ export const useMainStore = defineStore({
                 order.policy.isDamageGlassOnly = data?.policy?.isDamageGlassOnly;
                 order.policy.policyNumber = data?.policy?.policyNumber;
                 order.policy.policyZipCode = data?.policy?.policyZipCode;
-                order.policy.memberNumber = data?.policy?.memberNumber;
 
                 order.referralNumber = data?.referralNumber;
                 order.referralDate = data?.referralDate;
diff --git a/src/store/store.spec.js b/src/store/store.spec.js
index 78345ff4..c52ee6cf 100644
--- a/src/store/store.spec.js
+++ b/src/store/store.spec.js
@@ -1496,6 +1496,30 @@ describe('Store', () => {
                     })
                 }));
             });
+            it('useMemberNumber is true => member number set and policy number changed after response', async () => {
+                // Arrange
+                const originalPolicyNumber = getRandomString(6, 6);
+                store.order.policy.policyNumber = originalPolicyNumber;
+                const returnedPolicyNumber = getRandomString(6, 6);
+                const responseNoPolicies = {
+                    data: {
+                        policies: [{
+                            policyNumber: returnedPolicyNumber
+                        }]
+                    }
+                };
+                store.issConfig.isCoverageEnabled = true;
+                store.applicationUser.coverageLookupAttempts = 0;
+                store.issConfig.useMemberNumber = true;
+                globalMethods.callHttpClient = jest.fn().mockReturnValue(Promise.resolve(responseNoPolicies));
+
+                // Act
+                await store.getCoveragePolicyInfo();
+
+                // Asserts
+                expect(store.order.policy.memberNumber).toBe(originalPolicyNumber);
+                expect(store.order.policy.policyNumber).toBe(returnedPolicyNumber);
+            })
             it('null response by api => insuranceCoverage.coverageType is NONE', async () => {
                 // Arrange
                 store.issConfig.isCoverageEnabled = true;