The implementation of Law number 11/2008 concerning Electronic Information and Transactions Article 11 states that electronic signatures have legal force and legal consequences, meaning that the legal power of electronic signatures is the same as wet signatures. This Digital Billing (TD) application aims to verify and validate the Digital Signature on invoices issued by PT Japati Indonesia in accordance with the standards provided by Article 11 of the ITE Law. Japati clients using the Digital Bills application scan the QR code on the invoice sent by PT Japati, and after being validated by the TD application, match the information on the invoice with the information displayed by the TD application. If the information displayed is the same and matches, then the invoice has been validated from PT Japati Indonesia. The advantages of using a digital signature are as follows:
1). Invoices do not need to be manually signed and stamped wet
2). Invoices do not need to be sent by courier service but can be sent via email
3). Because it is sent via email, the invoice is received by the client much faster and definitely
4). Data in invoices can be validated for validity quickly and accurately