From an applications' point of view, the main advantage of Camenisch et al.'s multi-show unlinkable credentials over the more efficient Brands credentials is the multi-show unlinkable property. However, this property is mainly of practical interest in an off-line setting. Brands credentials provide a mechanism that gives analogous functionality without sacrificing performance: an efficient batch issuing protocol which can simultaneously issue many unlinkable credentials. This mechanism can be combined with a privacy preserving certificate refresh process (which gives a fresh unlinkable credential with the same attributes as a previous spent credential).