The appropriate wording for a certificate of achievement entails a title such as Certificate of Achievement and a field for the recipient's name. Other sections are fine, but only the previous two are required. The title can also be worded as "Certificate of Recognition" or "Certificate of Excellence," for example.
Optional wording fields for a certificate of achievement include a presentation line between the title and recipient's name; it should read something like: "is awarded to." Another field can signify who the certificate is from, and a description line can explain the basis of the award. Date and signature lines can appear near the bottom.