Methods are provided for associating a specific one of two or more distinct fluid transfer ports of a patient with a given fluid transfer event of fluid from a parenteral fluid delivery device. Aspects of the methods include establishing a fluid transfer connection between the parenteral fluid delivery device and the patient via one of the two or more distinct fluid transfer ports and transmitting a fluid transfer signal between the parenteral fluid delivery device and a patient associated identifier using the patient's body as a signal conduction medium. Association may result in identification of the fluid transfer port that will be, is being or has been employed for the given fluid transfer event. Also provided are systems for practicing methods of the invention.