A seal for tote boxes includes a post member of extended length which has an enlarged end portion and a housing which has locking fingers which flex to accept the enlarged end of the post member and then lock to prevent removal of the post member. The housing includes a pair of upwardly projecting flanges, and a downwardly projecting flange. When installed on tote box the upwardly projecting flanges maintain the position of the downwardly projecting flange so that it is visible past the handle of the tote box allowing visual access to indicia on the downwardly projecting flange and allowing an authorized user to cut the post portion to remove the seal.