The solicitation documents must clearly state the acceptable method(s) of transmittal of submissions. Generally, submissions shall be in writing, transmitted to UN/PD or the CPO by mail, messenger or overnight delivery and sent in sealed envelopes marked with the solicitation documents number and the bid or proposal opening date, time and place or sent by fax to a secure fax location, if transmission by fax is permitted. Unless such methods of submission are specifically allowed in the solicitation document, the documents shall state that submissions received via facsimile or electronic means will be rejected.

Low-Value Procurements
For low-value procurement, currently fixed at USD 4,000, the Procurement Staff may allow the invited vendors to furnish submissions by way of facsimile or may accept quotations via e-mail or orally. The Procurement Staff shall document quotations received via electronic means or orally in a note to the procurement case file

Methods of Submission for RFPs
RFPs shall require the invited vendors to submit the technical proposal and the commercial proposal in two separate envelopes, clearly marked to show the content of each envelope.