Coupon 5.x-3.4

I'm trying to set up gift certificate sales on my web site. After purchasing a gift certificate using the PayPal Sandbox environment the email received does not include any of the coupon data, yet when I pull up the coupon through the admin menu it appears to have been created correctly. The email is set up using the default tokens. Has anyone ran into this before or have any idea where I should look? Thanks in advance

Dear Customer

Here is your gift certificate.
To redeem this Certificate please the following number during your next purchase to get a discount of up to $0.00.