All TDG trained individuals shall:
Below is the information that is required on a dangerous good certificate:

The topics of training are also required and are usually on the back of the card. below is an example. Often times there are also blank topic spots for company specific training which would be required if someone was to take only a generic course.

Note: TDG certificates are non-transferable and if you change companies it would no longer be valid. This is because TDG training is suppose to cover specifics on the products and classes one works with.