1. A method, comprising: authenticating one or more service providers that provide one or more services to users, the one or more service providers being authenticated for sending content to the users via a document banking system; receiving one or more templates from the one or more service providers, the one or more templates correspond to the one or more services, the one or more service providers and corresponding templates are registered with the document banking system; receiving content from a service provider corresponding to a service used by a user, the content is received via secure Application Program Interfaces (APIs), the content being received along with details of the service provider, the service provider having a document bank account with the document banking system, the user having a document bank account with the document banking system; determining whether the service provider is an authenticated service provider; based on the determination of whether the service provider is an authenticated service provider, identifying a template corresponding to the service for which the content is received; overlaying the received content over the identified template: to generate a document or to update a document with the content received from the service provider; and adding the generated document or the updated document to the document bank account of the user.