sentences:  If a domain name is due to return to the open market, then the owner of the back-order will be given the first opportunity to acquire the domain name before the name is deleted and is open to a free-for-all.In this way back-orders will usually take precedence over drop-catch.There may be a fee for the back-order itself, often only one back-order can be placed per domain name and a further purchase or renewal fee may be applicable if the back-order succeeds.