In usual cases if you email us as at hello@poundlashes.co.uk as soon as the mistake is made we can usually amend your address in time before we ship, if the mistake has been made after the item has been dispatched Royal Mail will usually return the package to us, however for the parcel to be resent you must pay your original postage cost again, if you decide to opt for a refund the refund will be minus the original postage.