Called me  an hour ago. gave me a 1-888 number to call. Man said, "I was asked to call you in regards to your company's OSHA safety compliance".

Remember that all of OSHA's materials are available for free on their website, so there's never any reason to pay anyone for this literature.

OSHA's website overs these types of scams;
https://www.osha.gov/Publications/workplace_poster_page.html

Caller identified himself as Jeff Bacon with Safety Services Company.  Something about OSHA compliance.  I hung up as I know these are scams.  Forms are free from OSHA's website.