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Change from CV1

High-level overview

As a high-level overview, we will explain the difference from below point of view.

  • Difference from CV1
    • Improvements
    • CV2 UX flow (CV2 demo site)
    • Major changes from CV1 in each feature
  • CV2 integration flow
  • Integration Guide


There are three major improvements.

1. ITP compatible

CV1 uses Cookie and there will be ITP impact
CV2 doesn’t use Cookie, and so no ITP impact
2. Less impact to site design

CV1 provides only 4 types of buttons.
Address and payment instrument needs to be implemented on merchant site with Widgets.
CV2 provides button size flexibility.
With CV2, address and payment instruments are managed on Amazon Pay Hosted page.
3. Authorization error handling

CV1 requires merchants to handle complex authorization response handling.
CV2 manages authorization error handling at Amazon.
Merchants only provides redirect URL for success and error cases.

*ITP (Intelligent Tracking Prevention) is a browser function whose main purpose is to protect user privacy from advertisements and affiliates, and the trend is to strengthen usage restrictions on cookies that can record and store user information.

CV2 UX flow (CV2 demo site)

Please refer to CV2 demo site.

Major changes from CV1 in each feature.

FeatureChange from CV1Comment
ButtonYesNew implementation method for button render. Shipping address and payment instrument widget is no longer needed.
APIYesType of API and method are change
IPNYesIPN notifies only ID, and merchant calls Get API to get the contents of notification.
Seller CentralYesMerchant can issue API keys in Seller Central.
CV2 object is automatically converted to CV1 object in Transaction Management
Merchant needs to translate the status from one to another.
FAQ - How can I get Seller Central repoprts?
Email notification to buyerYesAuthorization cancellation notification email is added.
*Email is sent when CheckoutSession in not completed till expiration.
FAQ - I want to know the contents of email sent by Amazon to buyers
Buyer my pageNo-

CV2 integration flow

OneTime and Recurring

Please refer to OneTime and Recurrig Integration Flow

Integration Guide

We have a site to introduce integration guide and API references.

  • This site also provides demosite URLs and sample flow diagram.
  • You will find a link to our SDKs on ths page, so please downalod preferred SDK as needed.

Inside the Integration Guide, you can find "How to upgrade to CV2" instructions, too.
Upgrading to Checktou v2

We also have CV2 FAQs updated on daily basis (Note the site is only available in Japanese)
FAQ site

CV2 overview

Button rendering script and API are revamped with CV2, so we will explain you some important points below.

Preparation for CV2 API calls

Please refer to Integration

CV2 API and Objects

CV2 Sequence diagram

CV2 validation before going live

CV1 vs CV2 object

This is the object mapping between CV1 and CV2 for OneTime payment. Text starting with P is ID for each object, and ID format is slightly changed


CV1 vs CV2 API

APIs are different between CV1 and CV2. Below is a mapping for OneTime payment case as an example.

Major functionCV1CV2
API nameParameterAPI nameParameter
Amazon Pay buttonCV1 button script
Redirected URL
(Get OrderReferenceID with address widget)
CV2 button script
Redirected URL
(Get CheckoutSessionID by URL parameter)
Shipping addressGetOrderReferenceDetailsGetCheckoutSession
Order data generation, AuthorizationSetOrderReferenceDetails
Order amountUpdateCheckoutSessionOrder amount
Return URL after Amazon Pay ordering page.
Complete checkout-CompleteCheckoutSession
CaptureCaptureOrder amountCaptureChargeOrder amount
Re-authorizeAuthorizeOrder amountCreateChargeOrder amount
RefundRefundOrder amountCreateRefundOrder amount

*KeyIDs, region, currency code excluded

Supplemental information

Other features

Account information

As same with CV1, you can get buyer information, shipping address and billing address.
*In order to retrieve account information, you need to set "scopes" when rendering Amazon Pay button.
✓ Furigana (name pronouciation), date of birth and gender are not provided by Amazon as we don't hold such information.
✓ Billing address and buyer information will not be provided by Amazon when buyer chose to pay only with Amazon Gift Card.
Please refer to Address and Payment Instrument Detail for more detail.

Seller Central (No change from CV1)

Seller Central feature is same for CV1 and CV2. Object status shown on Seller Central uses different status name from status returned via API.
Pleade refer to FAQ - How can I get Seller Central reports? for more detail.

Email notification

There is one email notification added with CV2

Advanced feature

Multiple charge

Please refer to Multiple Charge

Over charge, Reduce charge

Please refer to Over charge, Reduce charge

Extend charge permission expiration

Please refer to Extend charge permission expiration


You can use Amazon SignIn on your login page, which will enable buyer login with Amazon credential on your site.
With Amazon SignIn, Amazon provides unique ID of a buyer, and you will save this ID linked to your member account ID in your member database.
You can also utilize buyer information provided by Amaozn in the signup flow as needed. signIn_flow

Please note you need to add column or table in your DB to store Amazon buyer's unique ID linked to your member account ID.


You can use Amazon Pay as one of the payment method by implementing Amazon Pay as AdditinalPaymentButton (aka APB).
With APB, a buyer will complete checkout on Amazon hosted page (without being redirected to merchant's order review page).
You can use APB with both PayOnly and PayAndShip scenarios.
Please note that if you use APB with PayAndShip, you will not be using shipping address provided by Amazon.

CV2 Frequently Asked Questions