Hi JasonSali,
International organisations normally distinguish between those they consider to be `officials' (see
INTM860630) and `consultants' (generally designated by the organisations as `experts on mission') who are considered to have the status of independent contractors. The customer has advised they are a freelance contractor rather than an employee.
INTM860750 refers specifically to employees. Claims to exemption from individuals regarded by the organisation as `consultants' or `experts on mission' should be resisted and their fees taxed in the normal way. See
INTM860760 -
INTM860760 - Employees of International Organisations: Experts/consultants. We cannot give any rulings/opinions in relation to international employments on a general forum, there is a specialist business area (the email is in the manual reference I have supplied). You should supply full facts in writing for further advice.
Thank you.