The present invention discloses a method and a system for inserting documents (32) in an automated manner into load supports, in particular into containers (30), which are transported by means of a conveyor (26) in an order-picking system (10), comprising: a document guiding device (40) for storing one, preferably single, document (32), and for mechanically guiding same to an assigned load support, which passes the document insertion apparatus (12;12′) by means of the conveyor (26) in an automated manner such that the document (32) can be moved actively into the assigned load support, wherein the document guiding device (40) comprises receiving members (42, 44; 90) which are arranged substantially oppositely horizontal and are mounted movably relative to each other, wherein in a receiving position (FIG. 6A) the receiving members (42, 44; 90) receive the document (32) in a space therebetween.