In some cases, for a fee, students also may obtain a certificate or letter of completion.

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The giver fills out a form -- and for a fee the company e-mails the recipient a virtual gift certificate.

CNN: Shoppers, computer

Up until now he hasn't seen the value in paying the monthly subscription fee for a service he barely has time to use, but when someone hands you a certificate for a free year of digital service, you're gonna accept.

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