Buyers pay with the cards and details already saved in their Amazon account — one of the highest-trust wallets in the US, Europe, UK and Japan. Registration is self-serve in Amazon Pay Seller Central, but travel and tour services are a restricted category that needs Amazon's prior approval before you can take payments (see pay.amazon.com/help/6023). You'll find the Merchant ID, Store ID and API keys under Seller Central → Integration Central.
Amazon Pay lets your customers pay with the payment methods already saved in their Amazon account, so they can complete a booking without entering card details. It is available to businesses in the US, the UK, Europe and Japan. Note that travel and tour services are a restricted category at Amazon, so you need Amazon's prior approval before you can accept payments. Once Amazon Pay confirms a payment, TourTask automatically marks the booking as paid and sends confirmations to both your business and the customer.
You can use Amazon Pay if your business is based in one of these countries:
Your customers can be charged in any of these currencies:

To connect Amazon Pay, you'll need these credentials from your Amazon Pay account:
Amazon Pay lets customers pay with what their Amazon account already holds. Registration is self-serve, but plan for one approval step: travel and tour services are a restricted category, and Amazon must approve your business for it before you can charge.
Sign up at pay.amazon.com for your region — Amazon Pay serves merchants in the US, the UK, Japan and 15 European countries — which opens Amazon Pay Seller Central for your account. Then request approval for the travel category (Amazon's policy page is pay.amazon.com/help/6023): apply before you plan to go live, and wait for Amazon's confirmation before charging real customers.
In Seller Central open Integration Central and create an API key pair. That gives you the four values TourTask needs: the Merchant ID, the Store ID, the Public key ID, and a downloaded private key file (a PEM text file — keep it safe; Amazon cannot re-download it for you). While you are there, add your booking page's web addresses to the allowed domains — the Amazon Pay button refuses to render on a domain Amazon doesn't know about.
In TourTask go to Configuration → Payment options, add Amazon Pay, and pick your country. The currency follows your Amazon Pay region automatically: USD for US merchants, GBP for the UK, JPY for Japan, and EUR for European merchants (including Sweden, Denmark, Switzerland and Hungary — Amazon Pay Europe settles them all in EUR). Paste the Merchant ID, Store ID and Public key ID, paste the private key file's full contents into the private-key field, and press Activate. Customers then get Amazon's own button, finish the payment on Amazon-hosted pages, and the booking confirms when they return.
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