https://www.businessinsider.com/reti...nments-2022-10
Under the Emoluments Clause Restrictions, the Consitution states that retired US military personnel, which generally applies to those who served at least 20 years in uniform and are eligible to receive a pension, cannot receive consulting fees, gifts, jobs, or titles from foreign governments without expressed approval from Congress.
The Post found however that approval is almost always granted. Out of the 500 requests since 2015, about 95% were approved. The Post also reported that some people negotiated jobs with foreign governments during active service.
There is no penalty for violating the law and enforcement is rare, according to the publication.
One of the more prolific cases of a former US military officer being penalized for accepting fees from a foreign government was Michael Flynn, the former national security advisor to Donald Trump.