How many directors need to sign the Resolution

minimum 2 directors, It must be signed by two directors with the rubber seal/stamp of the company with a quorum at a Board Meeting

The signing of resolutions for a company is governed by the Companies Act, 2013 and the articles of association of the company.

According to Section 175 of the Companies Act, 2013, every resolution of the Board of Directors of a company shall be passed by a majority of the directors present at a meeting of the Board. However, the articles of association of the company may require a higher majority or quorum for passing a resolution.

In your case, if the articles of association do not specify any requirement for the number of directors who need to sign a resolution, then it is recommended to have all the directors sign the resolution to ensure that it is valid and legally binding.

If only two out of the four directors have given their resolution, it means that the other two directors have not given their consent or approval on the matter. It is important to obtain the approval of all the directors or a majority of them, as per the articles of association, for the resolution to be valid.

Therefore, it is not advisable for only one director to sign the resolution, as it may not comply with the legal requirements and may also raise questions about the validity of the resolution in case of any disputes or legal proceedings in the future.