This is what is used at US universities.

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So: BLANK CREDIT IS AWARDED IN CERTAIN CASES/IN THE CASE OF CERTAIN COURSES.

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Examples:

In general, credit is granted for a course, which is considered equivalent to a course at York and for which the student received the grade of "D" or better at a unit of The City University, or "C" or better at any other accredited institution. "Blanket credit" is given for courses, within disciplines available at York, which have no precise equivalent at York College.

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Audit and Credit/No Credit Request - University of Northern ...
https://www.uni.edu/.../registration-audit-an...
University of Northern Iowa
Not more than 22 hours of ungraded course work, in addition to courses authorized to be offered only for ungraded credit, may be taken toward any bachelor's ...

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Academic Policies and Information | Webster University
www.webster.edu/catalog/.../academic-policies.html
Webster University
Webster University Undergraduate Catalog information on academic policies, including ... the student's exceptional academic work in the ungraded credit hours.


Charles Sturt University Grades
https://online.csu.edu.au/Web/gradecod.htm
Charles Sturt University
The following grades are to be awarded for subjects offered by the University. ... TCR Transfer Credit: The student has been granted an ungraded credit.

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Yale University Bulletin | Yale Law School 2015–2016 ...
www.yale.edu/.../academic-requirements-and-options.ht...
Yale University
No more than a total of 5 units of ungraded credit in student-directed programs may be counted toward the degree. Credit/fail work will not be accepted toward ...