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Over charge, Reduce charge

Over charge​

If you set parameter for over-charge when rending Amazon Pay button, you can over charge against Charge Permission.

In this case, chargeable amount limit is 70,000yen or 900% of amount set by Update Checkout Session API, whichever is higher.

If you want to enable over-charge, please set below parameter in Amazon Pay rendering script.

paymentDetails.allowOvercharge = true

caution

If you don't set this parameter when button rendering, you cannot over-charge.

Reduce charge​

You can Capture Charge with redueced amount as small as 1 yen.


Ref (only available in Japanese): FAQ - I want to know how to overCharge and reduceCharge after checkout complete

tip

In case you have a plan to over charge or reduce charge, please communicate it to the buyer in advance to avoid trouble with buyer later (Please note Amazon Pay will not send any special notification to buyer about over charge or reduce charge).