In principle, you may order food from a delivery service even during quarantine. However, these must be ordered, paid for and handed over without contact. For example, you can place the order by phone or online and indicate that you are in domestic isolation. Also, payment must not be made in cash, but should be made online. Upon delivery, the delivery service should then leave the food at the door without contact, according to the Federal Center for Health Education in its fact sheet on domestic quarantine. Food deliveries are also possible in this way. The main thing is that the entire transaction is contactless. Stand-alone delivery services that do not offer contactless payment are thus eliminated.