The only case in which you can apply for a refund is when lag (or other system related issues) may cause you to accidentally purchase the same product twice (i.e. one right after the other).
In such cases, please submit a notecard to Hart Larsson titled “Double Purchase” and add your full avatar name.
In the note you must copy/paste the 2 transactions from your transaction history. Make sure it contains the transaction number and details for verification.
As long as the request is submitted within 2 weeks after having purchased the product, Hart will be more than willing to refund you.