What does a valid certificate look like?

The following element can be found on the page of an online shop that has been successfully certified:

By clicking on this element, it appears in its maximised version:

If you click on the maximised version of the trustmark, you will be redirected to the online shop’s certificate, which must be “valid”:

If still in doubt, you can use the shop search, enabling you to find all online shops that have been certified by Trusted Shops.