Sometimes the system will prompt an invalid coupon code when you use it.
There are some factors:
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It is unable to make any changes to an existing order. There is a short period of time in which an order may be cancelled.
If you send the payment by using the PayPal or e-check, the seller will confirm your payment within approximately 1 business day once your payment is clear. Before that, your order status will remain 'Awaiting Payment'.
When you have added the item you to shopping cart, you would process checkout. Click the checkout button, and you can see there are two kinds of payment methods.
The one is PayPal Express, it is recommended to all of the customers whether you have registered or not. The other is Standard Checkout which you can pay via it only you have registered on buyincoins.com. It is helpful for you to manage your orders.
Also, you can visit Buyincoins Official Website to get more helps, faqs and knowledge base.
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