The development of certification is long-term and requires cooperation between different parties.

Changing patterns of co-operation is part of the process;  various parties bring their input into system and may leave out from cooperation once the interest doesn’t exist anymore. The certification logo has also changed over time, reflecting the cooperation at each period.

During years 2014 - 2015 the certification system was developed and the certification was available in connection to Safe to Play trainings from the beginning of 2015.

During summer 2015 a three year long cooperation was initiated with The Finnish Association of Landscape Industries (VYL) to develop certification for Designers, Managers, Project managers and Inspectors of playgrounds and recreational sports areas.
From the begining of 2018 Safe to Play initiated cooperation with Register of Play inspectors Internationalin (RPII) with the following public statement: Safe to Play Oy and RPII (Register of Play Inspector International) have initiated co-operation with intention to develop qualifications for different roles in the play Industry.
In 18th of April 2019 the S2P certification board decided to continue certification development independenlty with the following guiding principles: International availability, value for certified and using of modern technology. ISO 17024 accreditation process with Finnish Government's office FINAS initiated in 2020.