diff --git a/packages/plugin-ecommerce/src/endpoints/confirmOrder.ts b/packages/plugin-ecommerce/src/endpoints/confirmOrder.ts
index 99bafd80c56..3b9e184a27b 100644
--- a/packages/plugin-ecommerce/src/endpoints/confirmOrder.ts
+++ b/packages/plugin-ecommerce/src/endpoints/confirmOrder.ts
@@ -58,7 +58,7 @@ export const confirmOrderHandler: ConfirmOrderHandler =
 
     const data = req.data
     const payload = req.payload
-    const user = req.user
+    const user = req.user?.collection === customersSlug ? req.user : undefined
 
     let currency: string = currenciesConfig.defaultCurrency
     let cartID: DefaultDocumentIDType = data?.cartID
diff --git a/packages/plugin-ecommerce/src/endpoints/initiatePayment.ts b/packages/plugin-ecommerce/src/endpoints/initiatePayment.ts
index 5811909c939..3eeb9d0685c 100644
--- a/packages/plugin-ecommerce/src/endpoints/initiatePayment.ts
+++ b/packages/plugin-ecommerce/src/endpoints/initiatePayment.ts
@@ -64,7 +64,7 @@ export const initiatePaymentHandler: InitiatePayment =
     await addDataAndFileToRequest(req)
     const data = req.data
     const payload = req.payload
-    const user = req.user
+    const user = req.user?.collection === customersSlug ? req.user : undefined
 
     let currency: string = currenciesConfig.defaultCurrency
     let cartID: DefaultDocumentIDType = data?.cartID
diff --git a/packages/plugin-ecommerce/src/index.ts b/packages/plugin-ecommerce/src/index.ts
index 1a5059719c6..67d36693b53 100644
--- a/packages/plugin-ecommerce/src/index.ts
+++ b/packages/plugin-ecommerce/src/index.ts
@@ -232,7 +232,9 @@ export const ecommercePlugin =
 
           const initiatePayment: Endpoint = {
             handler: initiatePaymentHandler({
+              cartsSlug: collectionSlugMap.carts,
               currenciesConfig,
+              customersSlug: collectionSlugMap.customers,
               inventory: sanitizedPluginConfig.inventory,
               paymentMethod,
               productsSlug: collectionSlugMap.products,
diff --git a/packages/plugin-ecommerce/src/payments/adapters/stripe/confirmOrder.ts b/packages/plugin-ecommerce/src/payments/adapters/stripe/confirmOrder.ts
index 983b093712a..b519fb1330c 100644
--- a/packages/plugin-ecommerce/src/payments/adapters/stripe/confirmOrder.ts
+++ b/packages/plugin-ecommerce/src/payments/adapters/stripe/confirmOrder.ts
@@ -13,6 +13,7 @@ export const confirmOrder: (props: Props) => NonNullable<PaymentAdapter>['confir
   (props) =>
   async ({
     cartsSlug = 'carts',
+    customersSlug = 'users',
     data,
     ordersSlug = 'orders',
     req,
@@ -102,7 +103,9 @@ export const confirmOrder: (props: Props) => NonNullable<PaymentAdapter>['confir
         data: {
           amount: paymentIntent.amount,
           currency: paymentIntent.currency.toUpperCase(),
-          ...(req.user ? { customer: req.user.id } : { customerEmail }),
+          ...(req.user?.collection === customersSlug
+            ? { customer: req.user.id }
+            : { customerEmail }),
           items: cartItemsSnapshot,
           shippingAddress,
           status: 'processing',
diff --git a/packages/plugin-ecommerce/src/payments/adapters/stripe/initiatePayment.ts b/packages/plugin-ecommerce/src/payments/adapters/stripe/initiatePayment.ts
index ef111c7f679..e1fb1ba8b10 100644
--- a/packages/plugin-ecommerce/src/payments/adapters/stripe/initiatePayment.ts
+++ b/packages/plugin-ecommerce/src/payments/adapters/stripe/initiatePayment.ts
@@ -11,7 +11,7 @@ type Props = {
 
 export const initiatePayment: (props: Props) => NonNullable<PaymentAdapter>['initiatePayment'] =
   (props) =>
-  async ({ data, req, transactionsSlug }) => {
+  async ({ customersSlug = 'users', data, req, transactionsSlug }) => {
     const payload = req.payload
     const { apiVersion, appInfo, secretKey } = props || {}
 
@@ -106,7 +106,9 @@ export const initiatePayment: (props: Props) => NonNullable<PaymentAdapter>['ini
       const transaction = await payload.create({
         collection: transactionsSlug,
         data: {
-          ...(req.user ? { customer: req.user.id } : { customerEmail }),
+          ...(req.user?.collection === customersSlug
+            ? { customer: req.user.id }
+            : { customerEmail }),
           amount: paymentIntent.amount,
           billingAddress: billingAddressFromData,
           cart: cart.id,