These are often "one-time use" and have no cash value. In most cases, if you return an item bought with a promotional certificate, the certificate is forfeited and not refunded.
If you used a certificate as a partial payment (e.g., a $20 certificate on an $80 item): return best buy reward certificate
You will receive a refund for the actual dollar amount paid (the $60) to your original payment method. These are often "one-time use" and have no cash value
If your points don't show up after a week, users and experts recommend the following: My Best Buy Memberships™ FAQs return best buy reward certificate