automatic
adjective
uk/ˌɔːtəˈmætɪk/ usan automatic machine, process, or system is able to operate, complete a task, or move by itself without being controlled by a person:
Tick the 'automatic update' box and the date and time will be updated for you.
automatic sliding doors
automatic payment/transfer/withdrawal
happening as a usual result, without the need for extra permission, approval, proof, etc.:
EU nationals have the automatic right to apply for jobs in other countries within the European Union.