The Face value of the shares in the Authorised share capital shall be Face value of the Issued, Subscribed and paid up share capital of the Company even for private limited company. (not denomination, it is face value of each share) Further, in case of anomaly in the issued, Subscribed and paid up Share capital , the only correction / rectification shall be done for the Share certificates already issued by the said private limited company.
You may call back the share certificate issued to the shareholders (only handful in case of private companies) and rectify with reference to the actual amount of money received vis-a-vis the issue of share certificate ( No. of shares X face value).
Of course, I am sure it will not happen in the case of public limited company/companies to be listed on stock exchange.
Hope this clarifies,
regards