[5] OCR also manages the UK's national examination centre registration numbering system on behalf of several Joint Council for Qualifications (JCQ) member bodies.

[3] In some of its material, OCR has made mistakes and inaccuracies, sometimes including inaccurate or fictitious content in subject specifications or errors in exam papers.

2012: A Channel 4 News investigation revealed that examiners were making the most basic errors, such as wrongly adding up marks on hundreds of papers, which in some cases led to candidates in 2011 getting an incorrect grade.

A senior supervisor at OCR, David Leitch, ordered his team perform supplementary checks on scripts by the same markers, and found hundreds of errors.

This led to OCR ordering these additional checks to stop, and to only inform those schools which had specifically requested scripts to be re-marked.

[11][12] 2014: UK exam regulator Ofqual investigated OCR's "near miss" on issuing GCSE and A-level results on time.

[15][16] 2017: A question in the reformed OCR GCSE English Literature exam, sat by over ten thousand students, swapped the surnames of the families in the play Romeo and Juliet, asking how Tybalt's hatred of the Capulets influenced the outcome of the play, when in fact, Tybalt is a Capulet himself.

OCR apologised, undertook to ensure no candidates would be disadvantaged while the regulator Ofqual stated it was "very disappointed to learn of the error".

OCR was eventually fined £175,000 for their error on the English Literature exam, which Ofqual deemed not fit for purpose, as the question was "unanswerable".

OCR assured students that the final mark scheme would reflect the different approaches taken to the exam, and that the grade boundaries would take into account the challenges faced.