We have several examples of programmata relating to Marcus Cerrinius Vatia when he stood for aedile, including one apparently written on behalf of Vatia himself!
In addition to groups of tradespeople, a group from a certain area or neighbourhood might support a candidate. We can see here that the 'Salinienses' – those ‘around the Salt Gate’ (Herculaneum Gate today) – endorsed Vatia.
Most notices are the work of the same specialist sign writers who produced signs for games. They worked in teams at night; one man might prepare the whitewash background whilst another did the actual lettering. Sometimes they signed their work or added their support to the candidate. In these examples the sign writers give their names as Florus, Fructus, Infantio and Sabinus.