diff --git a/src/collections/hooks.ts b/src/collections/hooks.ts
index 831c37f..302a28d 100644
--- a/src/collections/hooks.ts
+++ b/src/collections/hooks.ts
@@ -7,7 +7,8 @@ export const initProviderPayment = async (payload: Payload, payment: Partial<Pay
 
   if (!billing) {
     throw new Error(
-      'Billing plugin not initialized. Make sure the billingPlugin is properly configured in your Payload config and that Payload has finished initializing.'
+      'Billing plugin not initialized. Make sure the billingPlugin is properly configured in your Payload config and that Payload has finished initializing. ' +
+      'If you are calling this from a Next.js API route or Server Component, ensure you are using getPayload() with the same config instance used in your Payload configuration.'
     )
   }
 
diff --git a/src/plugin/index.ts b/src/plugin/index.ts
index d596507..b2bcb17 100644
--- a/src/plugin/index.ts
+++ b/src/plugin/index.ts
@@ -4,7 +4,7 @@ import type { Config, Payload } from 'payload'
 import { createSingleton } from './singleton'
 import type { PaymentProvider } from '../providers/index'
 
-const singleton = createSingleton(Symbol('billingPlugin'))
+const singleton = createSingleton(Symbol.for('@xtr-dev/payload-billing'))
 
 type BillingPlugin = {
   config: BillingPluginConfig
diff --git a/src/providers/mollie.ts b/src/providers/mollie.ts
index 23ecc80..e4d6b87 100644
--- a/src/providers/mollie.ts
+++ b/src/providers/mollie.ts
@@ -14,7 +14,7 @@ import {
 import { formatAmountForProvider, isValidAmount, isValidCurrencyCode } from './currency'
 import { createContextLogger } from '../utils/logger'
 
-const symbol = Symbol('mollie')
+const symbol = Symbol.for('@xtr-dev/payload-billing/mollie')
 export type MollieProviderConfig = Parameters<typeof createMollieClient>[0]
 
 /**
diff --git a/src/providers/stripe.ts b/src/providers/stripe.ts
index b6854cf..2af0ae9 100644
--- a/src/providers/stripe.ts
+++ b/src/providers/stripe.ts
@@ -14,7 +14,7 @@ import {
 import { isValidAmount, isValidCurrencyCode } from './currency'
 import { createContextLogger } from '../utils/logger'
 
-const symbol = Symbol('stripe')
+const symbol = Symbol.for('@xtr-dev/payload-billing/stripe')
 
 export interface StripeProviderConfig {
   secretKey: string
diff --git a/src/providers/test.ts b/src/providers/test.ts
index bb5105b..644e23d 100644
--- a/src/providers/test.ts
+++ b/src/providers/test.ts
@@ -6,7 +6,7 @@ import { handleWebhookError, logWebhookEvent } from './utils'
 import { isValidAmount, isValidCurrencyCode } from './currency'
 import { createContextLogger } from '../utils/logger'
 
-const TestModeWarningSymbol = Symbol('TestModeWarning')
+const TestModeWarningSymbol = Symbol.for('@xtr-dev/payload-billing/test-mode-warning')
 const hasGivenTestModeWarning = () => TestModeWarningSymbol in globalThis
 const setTestModeWarning = () => ((<any>globalThis)[TestModeWarningSymbol] = true)