Unfolding $E_{11}$

We work out the unfolded formulation of the fields in the non-linear realisation of E_{11}E11. Using the connections in this formalism, we propose, at the linearised level, an infinite number of first-order duality relations between the dual fields in E_{11}E11. In this way, we introduce extra fields that do not belong to E_{11}E11 and we investigate their origin. The equations of motion of the fields are obtained by taking derivatives and higher traces of the duality relations.