The Bain signature app allows you to send and receive letters between the web and mobile. It allows you to take more than one action on letters such as signing, replying, referring, signing, and referring together in an easy and fast way. You can also search for the letters you want and take action on them. You can add signatures and visas to the app. It also supports two ways to reply to messages ، It consists of replying by writing text and replying by voice recording, and also the possibility of returning messages with the reason for the return if there are notes on the message.