54.1. The resolution plan disclosed that the appellant did not submit its claim, when the unrebutted case of the appellant had been that it had submitted its claim with proof on 30-1-2020 for a sum of Rs 43,40,31,951. No doubt, the record indicates that the appellant was advised to submit its claim in Form B (meant for operational creditor) in place of Form C (meant of financial creditor). But, assuming the appellant did not heed the advice, once the claim was submitted with proof, it could not have been overlooked merely because it was in a different form. As already discussed above, in our view the form in which a claim is to be submitted is directory. What is necessary is that the claim must have support from proof. Here, the resolution plan fails not only in acknowledging the claim made but also in mentioning the correct figure of the amount due and payable. According to the resolution plan, the amount outstanding was Rs 13,47,40,819 whereas, according to the appellant, the amount due and for which claim was made was Rs 43,40,31,951. This omission or error, as the case may be, in our view, materially affected the resolution plan as it was a vital information on which there ought to have been application of mind. Withholding the information adversely affected the interest of the appellant because, firstly, it affected its right of being served notice of the meeting of the CoC, available under Section 24(3)(c) IBC to an operational creditor with aggregate dues of not less than ten per cent of the debt and, secondly, in the proposed plan, outlay for the appellant got reduced, being a percentage of the dues payable. In our view, for the reasons above, the resolution plan stood vitiated. However, neither NCLT nor NCLAT addressed itself on the aforesaid aspects which render their