Possible Clues:

• Register
• Make one's attendance official
• Make one's attendance official, in a way
• Record one's arrival
• Type your username and password, say
• A security guard might ask you to do this
• Add one's name to a guest book, e.g.
• Record an arrival
• Prepare to check e-mail
• Almost conveying your thoughts without words, sometimes that's what the present should do