In an open bid or tender system，a double envelope system may be ud.The double envelope system parates the teibsp;proposal from the finang or cost proposal in the form of two parate and aled envelopes.During the tender evaluation，the teibsp;proposal would be opened and evaluated first followed by the finang proposal.The objective of this system is to ensure a fair evaluation of the proposal.The teibsp;proposal would be evaluated purely on its teibsp;merits and its ability to meet the requirements t forth in the Invitation without being unduly skewed by the financial proposal.
In the process of invitation for bids or tendering，a tender box will be t.A tender box is a mailbox that is ud to receive the physibsp;tender or bid dots.When a tender or bid is being called，a tender or bid number is usually issued as a referenbsp;number for the tender box.The tender box would be open for ied parties to submit their proposals for the duration of the bid or tender.Onbsp;the duration is over，the tender box is clod and aled and bsp;only be opened by either the tender or bid evaluation ittee or a member of the procurement department with one witness.
Registered tractors are usually required to furnish a bond for a certain amount as curity or ear money deposit to be adjusted against work done，normally in the form of Bank Guarantee or Surety.
While piling your tender respon，the most important thing is to do exactly as the Buyer asks，and if you are unsure of anything—ask them.Always think about what the Buyer is looking for when writing a tender，and write your respon within that text.Keep the following points in mind：
1）Write a tender respon in a simple but professional style.
2）Address exactly what the Buyer asks for，and ONLY what the Buyer asks for！
3）U a sistent writing style.
4）Be professional in the format and prentation of the respon.
If there is additional information that you think is relevant and you would like to include this detail，put it in an Added Value or Additional ProductsbrServibsp;.
Dots should be prented in a way that makes it as simple as possible for the Buyer to evaluate—if you get too sophisticated or try to be different，this often will not impress the evaluation team.Don’t fet the evaluation team is specifically asking for all proposals to be prented in a sistent way to make the evaluation process easier and quicker for them to plete.