You will receive a promotional code via e-mail from Amazon 2 days after your qualifying purchase has been shipped.
The offer is valid only for the products where it is displayed on the seller's product detail page.
The offer does not apply to purchases made from Amazon's Warehouse Deals or third-party sellers on Amazon Marketplace, even if labeled as "fulfilled by Amazon" or "Prime Eligible."
The offer only applies if the same delivery speed is selected for all Qualifying Items and Promotional Items, as applicable. Please check the "Delivery Details" section during checkout to confirm that all qualifying products and promotional items have the same delivery speed.
Here is an example of the email from Amazon with the Master Key.
If you did not receive a direct email with redemption instructions, please check Accounts & Lists > Your Messages, when signing into Amazon
Please note: Amazon, India follows a different delivery method than described here.