I agree with j, to a certain extent. Certificates can be written on toilet paper these days, and don't really prove much other than the recipients fundamental understanding of what they've been certified for. It also has its limits, especially in this current industry where things change much too often. There's also a chance, like for server administration, where you'll need to re-test every so often to have an up-to-date and valid certification.
In my experience, caring about a potential developer having a type of certification is a huge mistake and - more often than not - results in toxic work environments. You need to be able to perpetually learn and grow with your colleagues, because much like college degrees, your skill set will eventually become antiquated and you've leaned on those pseudo-intellectual qualifications for your entire career without properly evolving.