You can of course set a more-liberal refund policy if you choose, but legally, you only have to refund:1) in accordance with the terms of any written refund policy you have; 2) if you sent them defective goods, the wrong goods, or otherwise failed to comply with the terms of the order; 3) committed fraud--lied to them about what they would or were getting.Otherwise, there is no general right to a refund, especially for "buyer's remorse"--for simply deciding after the fact that you wish you had not made the purchase. Changing your mind is NOT grounds for a refund.