AIPMM provides a certification while Pragmatic Marketing and other training organizations provide only a certificate.
Certification includes an experience and education component and requires passing an exam administered by a certifying body. It allows a practitioner to put letters after his or her name (CPM, CPMM, CBM, etc.). The certification publishes a body of knowledge (The Guide to the Product Management and Marketing Body of Knowledge®). The certification is not tied to one training organization and generally has a network of independent training partners who conduct certification preparation training.
A certificate program typically indicates attendance or completion of a proprietary course or series of courses with a specific focus. The result demonstrates knowledge of proprietary content at the end of a specific period of time that is not published for review.
For more information on this you can download our brief on the differences here: Certificates vs Certifications