At the time of giving the project details, pelase add disclaimer clearly stating that the proposal is given for funding and that the information should be used for the purpose for which it is meant for.
If it is a IP matter, please do not mention the same in the project proposal and say that the details will be given at the time of appraisal etc.
With the growth of technology, you have other sources to know whether your details and invention is copied or not.
Thus because of your apprehension, you cannot stop making trials for project financing.
The above is meant for banks and financial institutions.
With regard to individuals/angel funders/vc funders, you can ask for a letter of non-disclosure since these people will be your future partners.
27 April 2012
Now next dilemma, suppose I have executed a Non-disclosure / confidentiality agreement, but I see there are chances to use or share the project plan with others. The project concept is not the new one as there are many players are exists in the same project (mostly unorganized players). But I have done all the analysis and research and placed all the information in documents so I want to prevent.