# Customer Service

- [Email Multiple Invoices](/customers/customer-service/email-multiple-invoices.md): In this module, its possible to mass-sent customer invoices to clients.
- [Search Invoices](/customers/customer-service/search-invoices.md): In this module find easily any Purchase Order that is invoiced in your UNOSOF application.
- [Rollback Customer Invoice](/customers/customer-service/rollback-customer-invoice.md): This modules eliminates a PO's invoice with the purpose of correcting or eliminating an issue of any matter.
- [Send Statements](/customers/customer-service/send-statements.md): This module manages the mass emailing of Account Statements to the Customer. An Account Statement is the summary of all invoices and financial transactions within a period of time.
- [Manage Invoice Footers](/customers/customer-service/manage-invoice-footers.md): This section helps to personalize footers for some doucments with additional information.
- [Customer Credits](/customers/customer-service/credit-notes.md): Here we explain how to apply a credit note in your UNOSOF application.