Here you can use banking system's deposit management system, like multiple banks handle, customers profile and its balance, transaction details and notification you can send also print transaction recepit.
Provides an example module for OWL.
Model's Attribute
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Odoo Tutorials
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Adds SMS features on quotations and sale orders
Sale Quotation
Tutorial about how to add SMS functionality to a model
Tutorial about how to create and use activity views
Tutorial about how to add the archiving feature on a model
Tutorial about how to optimize SEO, create metadata dynamically and creating custom social media previews.
Tutorial about how to create and use Javascript files in Odoo
Tutorial about how to create and use chatter functionalities in Odoo