Scrum Forum

is there any Scrum or Agile Certification for the department or Corporate like ISO or CMMI?

Do the Scrum.org certifications you have found seem to be irrelevant to those bodies?

What I mean if there any institution that certify scrum/agile for the whole corporate/departments instead of individual?  

See:

https://www.scrum.org/resources/evidence-based-management

As far as I’m aware there is no corresponding certification. At enterprise level, evidence of proficiency is measured empirically across a number of dimensions.

I'm going to go out on a limb and assume that you want to have this certification so that your company can claim it when they quote services to others.  But as @Ian said, I know of nothing like that and empirical evidence is used to speak as proof.  The ability to continuously deliver value is the proof of a good Scrum organization and evidence that they know how to use the Scrum framework to improve themselves.

I will go as far as to say that in a previous life I worked for a company that contracted one of those highly certified organizations and had the worst experience possible.  Just because an organization can get certified, it does not prove that the individual groups within the organization can live up to those standards. I would rather see many individuals with certifications than an organization.  That shows me that the people doing the work are appreciative of the ideals for which they have been certified.

I suggest that instead of looking for an organizational certification, maybe you should solicit customer testimonials instead.  They will probably have a better impact on companies looking to engage you.