As of January 1, 2020, in North Rhine-Westphalia new tombstones will have a certification requirement if the grave stones come from India, China, Vietnam or the Philippines. This is set by a new circular, which was published on 09 November 2019. So far, XertifiX is the only certifier accredited by the state of NRW.
Please refer (German only): Runderlass
Please refer to the website (German only): Feststellung der Funktionsfähigkeit des Zertifizierungsverfahrens nach § 4a Absatz 1 des Bestattungsgesetzes