A printer may judge whether a first type of communication with the print mediation server. The printer may execute the first type of communication and receive a predetermined notification in a case where it is judged that the first type of communication is executable. The printer may, (A) execute, when the predetermined notification is received a second type of communication so as to acquire specific address information, in the case where being judged that the first type of communication is executable and (B) execute, even if the predetermined notification is not received, the second type of communication at a predetermined timing so as to acquire the specific address information in a case where it is judged that the first type of communication is not executable. The printer may acquire the specific print data and print an image represented by the specific print data.