Mold is pervasive and common opportunistic molds are in your home. Paying someone to take an air sample to tell you there is common mold present is simply a scam. The internet is full of fake mold testers who claim to be certified by some organization which, itself, is not certified but they sell fake emblems and credentials to those who want to sell mold testing. The State of Florida licenses Mold Assessors. If the person is not a Licensed Mold Assessor, they are promoting fake credentials and selling you a mold scam.
In the USA, there is only one organization who provides fully accredited certifications for mold/IAQ professionals. That organization is the American Council for Accredited Certification (ACAC). Of the credentials for indoor environmental, only the CIEC is recognized by the Council of Engineering & Scientific Specialty Boards in meeting the highest credentials for a Certified Indoor Environmental Consultant.