It also serves as evidence in a monetary demand claim to illustrate that goods or services were provided, and payment was demanded. An invoice is a vital aspect of the audit trail of the vendor's business and failure to issue an invoice is a violation of the law.Īn invoice is used by a vendor or service provider when goods or services have been sold to clients or customers on credit. The Invoice is a bill of charges sent by an individual or business relating to a business transaction, which indicates the specific details of the goods or services sold, the quantity of goods sold, and applicable VAT.
