Looking on the internet deeply has found these results:

the certification has already expired is the most popular phrase on the web.

the certification had already expired 10 results on the web	the certification has already expired 13 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	... note that the proficiency exam must be completed by the trainee if this is the first time they are becoming certified or if the certification has already expired ... hour refresher course before his certification expires to be recertified or retake the initial certification training if the certification has already expired. ... note that the proficiency exam must be completed by the trainee if this is the first time they are becoming certified or if the certification has already expired ... ... take a four

the certification had already expired

10 results on the web

the certification has already expired

13 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

... note that the proficiency exam must be completed by the trainee if this is the first time they are becoming certified or if the certification has already expired ...
hour refresher course before his certification expires to be recertified or retake the initial certification training if the certification has already expired.
... note that the proficiency exam must be completed by the trainee if this is the first time they are becoming certified or if the certification has already expired ...
... take a four