# Checkout SDK
Checkout SDK enables users to checkout on a third-party platform with a `pay with transfer` and `buy now and pay later` option.
Checkout SDK is the client-facing project of Checkout SDK, written in Javascript It enables products to do more with payments in general.
## Steps
#### For Pay with Transfer
The checkout experience for a user on Duplo’s checkout SDK involves the following stages:
* Payment method option bank transfer (pay-with-transfer)
* When a user clicks bank transfer a bank details page that shows the account number payment should be made to is displayed and an “I've made payment“ button that takes the user to a verification page.
* The transaction is confirmed on the verification page.
* A success or error page is displayed depending on the outcome of the verification.
#### For BNPL
The checkout experience for a user on Duplo’s checkout SDK involves the following stages:
* Payment method option buy now pay later (bnpl)
* When a user clicks Buy Now Pay Later the user will be redirected to the loan details page to confirm the loan details (the payment date, amount, interest rate, and amount payable)
* If the user confirms the loan agreement, a success page is displayed, and the user is redirected to your website
* If the user does not confirm the loan agreement, an error page is displayed.
## Usage
Include Checkout JS and CSS files in your HTML like so:
#### For Pay With Transfer
```html
Duplo Checkout
```
#### For BNPL
```markup
Duplo Checkout
```
{% hint style="info" %} The `checkout_info` includes the customer’s information and the items in the cart
{% endhint %}