1. Overview OpenOTP Signature Plugin for Nextcloud allows authenticated users to self-sign a document or submit a document for Signature to Nextcloud users. It enables Electronic Signature with your Mobile with the OpenOTP Server which validates your identity and generates secure communication flow with all third parties involved in the signature process. All signature types (Standard, Advanced and Seal) are supported with that plugin. In order to use that plugin, you MUST HAVE OpenOTP Security Suite running in your infrastructure (on-premise or in the cloud).