For quick mailing labels, DYMO label is the ideal solution. DYMO is a third party product which will enable you to generate quick mailing labels from individual's screens.
With SAMS C/S you will be able to email a confirmation to the student directly from the record, provided you have a MAPI compliant messaging system (such as Outlook). The email confirmation will tell them which events they have registered for and their balance.
Selecting this option will print a confirmation letter.