Generally, Brookstone requires a receipt or proof of purchase to process returns. This documentation helps verify the transaction and ensure that customers receive the correct refund or exchange. If a receipt is not available, Brookstone may still accept the return under certain circumstances, but this may depend on the specific store policy or the terms of the sale. It is worth noting that items returned without a receipt may be subject to store credit or exchange only, rather than a cash refund. For detailed information about the return policy, including any potential exceptions, it is best to check the current returns section on the Brookstone website. This will provide the most accurate and up-to-date information regarding returns and exchanges.