Final answer:
This is an example of absentmindedness, which is a memory error caused by breaks in attention or focus.
Step-by-step explanation:
This is an example of absentmindedness. Absentmindedness is a memory error caused by breaks in attention or focus. In this case, forgetting to sign or type your name in a text message to a site you are interested in attending is a result of not paying close attention to the details while sending the message.