A printer comprising: a memory configured to store, for each of one or more user identification information for identifying one or more users different from an administrator of the printer, the user identification information and print setting information in association with each other; a communication interface; a first user identification information receiving unit configured to receive first user identification information among the one or more user identification information from a first external device via the communication interface; a first deletion request receiving unit configured to receive a first deletion request including first specific information from the first external device via the communication interface, the first deletion request being for requesting deletion of one of the one or more print setting information in the memory, the first specific information being for identifying first print setting information among the one or more print setting information in the memory; characterised in that the printer further comprises: a first deletion unit configured to, in a case where the first user identification information and the first deletion request are received from the first external device and the first user identification information is stored in the memory in association with the first print setting information, delete the first print setting information identified by the first specific information from the memory, wherein in a case where the first user identification information and the first deletion request are received from the first external device and the first user identification information is not stored in the memory in association with the first print setting information, the first print setting information identified by the first specific information is not deleted. a memory configured to store, for each of one or more user identification information for identifying one or more users different from an administrator of the printer, the user identification information and print setting information in association with each other; a communication interface; a first user identification information receiving unit configured to receive first user identification information among the one or more user identification information from a first external device via the communication interface; a first deletion request receiving unit configured to receive a first deletion request including first specific information from the first external device via the communication interface, the first deletion request being for requesting deletion of one of the one or more print setting information in the memory, the first specific information being for identifying first print setting information among the one or more print setting information in the memory; characterised in that the printer further comprises: a first deletion unit configured to, in a case where the first user identification information and the first deletion request are received from the first external device and the first user identification information is stored in the memory in association with the first print setting information, delete the first print setting information identified by the first specific information from the memory, wherein in a case where the first user identification information and the first deletion request are received from the first external device and the first user identification information is not stored in the memory in association with the first print setting information, the first print setting information identified by the first specific information is not deleted.