There are multiple reasons why your card might be getting declined.
These include:
wrong expiration date
wrong CVV code
wrong zip code
Additionally, it is possible that your credit card company is declining a charge for security concerns. We recommend contacting your credit card company and asking if there is some sort of a block on the charge. Often times they will be able to explain why the card is being declined. If you still have an issue purchasing a subscription to Dubb, please report back any new findings.
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If you are already subscribed and you need to update your credit card information
visit dubb.com/settings/payment-method (while logged into your Dubb account)