During his two-year tenure, Coetzee won just 11 of his 25 Tests in charge, with defeats to Italy, Wales and Ireland.
Despite boasting the worst win ratio of any 'Boks coach for 20 years, he refutes any responsibility and shifts the blame onto the SARU.
South Africa's Sunday Times newspaper reports Coetzee sent a scathing letter to the governing body, accusing it of ill-practice.
Coetzee met with CEO Jurie Roux on January 18 about what he thought was an upcoming performance review, but was told his time as Springboks coach was up.
