Corocor has various quality marks and accreditations which guarantee quality

The "Ondernemersorganisatie Schoonmaak- en Bedrijfsdiensten" (OSB)

It is the employers' organisation for the cleaning and window cleaning sector in the Netherlands. They represent the interests of our 300 members who, with 100,000 employees, realize 70% of the total turnover of the market. Companies that mainly focus on the business market such as calamity cleaning, office cleaning, window cleaning, facade treatment, trains, aircraft, schools and cleaning in the food industry.

OSB members must comply with strict requirements in the field of working conditions, payment of social premiums, the code of conduct for the cleaning industry, safety in the workplace and cleaning specific matters. OSB members must be in possession of the OSB Seal of Approval as of 1 January 2013. A quality mark that stands for quality and reliability.