In addition to the observation of Shri Saraswat Banerjee, I may point out that company laws are almost identical in every country, laying equal responsibilities on the Directors of the company who work on behalf of the company. The company is declared as an artificial person and a separate legal entity. Therefore, all directors are jointly, equally, and severally responsible for any transactions made for the company. According to any company law, no immunity can be granted to any director from any responsibility.
Furthermore, a cheque signing authority is not merely a nominal signatory of the cheque to fill in the blank. The purpose behind opening a joint account and having more than one signatory is to ensure that no illegitimate or illegal transactions are made for the company. Each signatory must play a role in cross-checking with approvals, invoices, vouchers, and other supporting documents to ensure that the company's funds are being used legitimately and in its best interest. This process also aims to prevent any fraudulent withdrawals or unapproved and undesirable expenditures.
Therefore, according to the legal position, no immunity is granted to any cheque signing authority. Consequently, there is no scope to obtain a financial release indemnity from the other cosignatory. Any such release, even if made, would be invalid in law.