Generally, most fashion brands allow for the return or exchange of items bought during a sale, subject to their return and exchange policy. However, the specific policy can vary between brands and even specific sales. For Beechtree, it's advisable to check their return and exchange policy directly on their official website or contact their customer service before making a purchase. It's important to note that return or exchange may not be possible on certain discounted items or special promotions. Always ensure you have all the information before purchasing.