Keeping a good Contact book is as important as having a good Invoce tool. For this, Invoice Manager includes a Contact Manager that you can use to store you contact's data for future and multiple use in your invoices.
You can save contact data directly from the invoice form, deciding to create a new contact, update existing contact or others. The invoice form includes a handy AJAX contact form to quickly automatically fill out contact data in your invoice from your contact database.
You can assign a real Joomla user to your contact so they can see their inovoices online. You can also have more than one contact assigned to the same Joomla user, in case some users have more than one profile for their invoices.