It happened as a result of a request from the employment and social affairs committee of the EU.
Amazon is allegedly preventing its chairman from looking into allegations of “fundamental rights” violations.
The move, which has an impact on 14 employees, was described by Amazon as “very disappointing”.
The company said in a statement that it had “repeatedly expressed our willingness to engage” with EU Employment and Social Affairs Committee members.
“As an organization with over 150,000 permanent workers here and over 25 years of experience doing business in the EU, we take our interactions with legislators in Brussels and throughout it.