Where can I find appreciation certificate wording? Or templates/samples would do.

Something like this will usually do:

The certificate of appreciation needs to have the organization name in bold characters, followed by the name of the person it is being presented to.

You'll also need minor details like the reason it's being presented, the date, and a signature of the official who is responsible for awarding the certificate.

Microsoft do some excellent ready made templates that you can download here: Http://office.microsoft.com/en-us/templates/certificate-of-appreciation-TC006256130.aspx