Techniques for providing extended shipping options are described. In some embodiments, a user may specify extended shipping options that are not otherwise provided by or accessible via an existing shipment information specification user interface. In one embodiment, the user accesses a module configured to facilitate specification of extended shipping options and in response, provide an indicator of the specified extended shipping option, such as a tag or uniform resource identifier. The indicator of the extended shipping option is then incorporated into a user interface element, such as an address field, of the shipment information specification user interface. Once the user finalizes the order, the indicator of the extended shipping option is transmitted along with other shipment information items to a merchant and/or carrier system, where services specified by the extended shipping option are initiated.