How can a firm check my certifications?

[broadpeak]

I have done last year all the three Qt certifications.
But.
In my country these certs hardly known.
How can a firm (who will employ me) check that my certifications are valid?
I applied to several firms as a Qt developer.
Sad to say, the firms in my country are very mistrustful.
I always have to confirm my knowledge in every application, I always have to make a C++ test and/or Qt test.
This is so annoying! I have thought that these exams will "validate" me.
Any idea?

[lgeyer]

There has been a "discussion":http://qt-project.org/forums/viewthread/9817 about online cerificate verification, but I don't know if there has been any progress yet.

As disappointing as this may sound, but I do think the problem is on the part of the companies you apply to, not on yours. All certificates contain your name, a candidate id and a certificate id which can be for sure used to manually verify your certificate asking PearsonVue or Nokia - if the companies wanted to do that in the first place.