however, when one of the signatures is forged on a contract, certain legal actions may be taken. by changing the amount, that individual has performed an act of forgery and is subject to criminal punishment, such as fines or imprisonment. the penalties include criminal charges, jail time, documents annulment, money reimbursement for the victim, or more.â  if you or your company are a victim of signature forgery, it is highly recommended to seek legal advice from an attorney immediately as fraud or forgery cases often have a statute of limitations. the uniform commercial code (ucc) is an act that has been put into law which governs commercial transactions and the sale of goods. it may consist of any mark, word, or symbol that has been adopted by a person who has the intention to authenticate a document of writing. for example, consider if an unauthorized signer gains access to bank account funds or makes it appear that you agree to illegitimate terms in contracts.