How do I use Velocity Script to format Custom Object?

Hello Community,

We are using a Custom Object (see below) to sync up the Certificates we offer customers in the form of Air, Car, Cruise, etc. The Certificate information is stored in our CRM Member Maint, which syncs up with Marketo each morning.

We have created fields that are connected to the Certificates Custom Object. These fields are shown below:

In our CRM, a customer’s certificate info can be viewed as shown below. We would like the ability to create a Velocity Script using this Custom Object that would allow us to show anyone who has just 1 certificate certain text in email. For example, “Don’t forget to use your certificate…” and for people with more than 1 certificate, “Don’t forget to use your certificates….” Do you have any suggestions for how we can go about doing this?

Thank you,

Laura