Citizen Help and Information Offices (OAC) PROCEDURES BY PRIOR APPOINTMENT AND ONLINE PROCEDURES, YOUR TIME IS YOUR OWN Book an appointment and we’ll help you with your municipal procedures. Choose the day, time and office that suit you best. The appointment service allows you to choose where and when to complete municipal procedures so that you can organise your time better. Choose the day and the time which suits you best. Choose the Citizen Help and Information Office (OAC) you want to use. If there is a problem with the appointment, we'll let you know. Asking for an appointment is very easy Go to ajuntament.barcelona.cat/cita. 010 or, if you are outside the Barcelona metropolitan area, 931 537 010 (ordinary rate). Conditions of service are published at ajuntament.barcelona.cat/atenciociutadana Prior appointments are needed for: Prior appointments are not needed for: Presentation of administrative complaints. For further information ajuntament.barcelona.cat/tràmits.