Cuneiform texts have survived in great majority in the Near East, written in 3D in negative on all sides of sun-dried clay tablets. This type of medium is not suitable a priori for binding. Nevertheless, there were several solutions to ‘bind’ together cuneiform clay tablets into one unit. Small quadrangular tablets were pierced to allow a string to pass through to attach them to an object, often a basket with tablets. Also, some texts, whether literary, mathematical or epistolary in nature, were not limited to the surface of a single tablet, however large it may be. These literary and mathematical tablets were not physically linked. However, in most cases, they were virtually bound through a colophon indicating their incipit and their number within a series. Letters, on the other hand, sometimes written on more than one tablet, had to reach their addressee in a single unit represented generally by an envelope. Several examples from the second and first millennia BCE have been identified as ‘second page’ of letters, this contribution envisages how these letters have reached their recipients in one unit.