professional courtesy

free service that people of the same profession provide for each other, especially common among physicians

As a gesture of professional courtesy, the lawyer offered free legal advice to her colleague.
Physicians often extend professional courtesy to fellow doctors by waiving consultation fees.
The accountant provided professional courtesy by offering a discounted tax preparation service to her colleague.
In academia, professors may grant professional courtesy by reviewing each other's research papers without charge.
Professional courtesy among architects often includes sharing industry insights and best practices without charge.

a practice in which law enforcement officers refrain from arresting or reporting fellow officers for certain infractions, such as traffic violations or minor offenses, out of mutual respect or solidarity

The officer let the speeding driver go after discovering he was a fellow cop, citing professional courtesy.
Critics argue that professional courtesy undermines accountability within law enforcement.
Professional courtesy was extended when the off-duty officer was found driving without a valid license.
The department issued new guidelines to limit the use of professional courtesy in misconduct cases.
Some officers view professional courtesy as a tradition, while others see it as a breach of ethics.