The Purpose of a Sample Invoice

Demonstration and Training: Businesses can use sample invoices to train their staff on how to create, fill out, and process invoices correctly. It provides a hands-on tool to familiarize new employees with the company's invoicing procedures.
Software and System Testing: Before implementing a new invoicing software or system, businesses often use sample invoices to test the functionality and ensure that all features are working as expected.
Client Communication: If clients or customers have questions about how to read or understand an invoice, a sample invoice can be shared as a reference, explaining different components without divulging sensitive or real transaction details.
Promotion of Invoicing Solutions: Companies that sell invoicing software or offer financial services may use sample invoices in promotional materials, demonstrations, or tutorials to show potential clients the capabilities of their product or service.
Template Preview: For businesses or freelancers looking for invoicing templates online, providers often showcase sample invoices to give potential users a preview of the design and layout they're offering.
Setting Standards: For larger organizations or franchises, a sample invoice can set the standard format that all branches or divisions should follow, ensuring uniformity across the board.

In essence, a sample invoice provides a non-binding example that illustrates the structure and elements of an invoice without reflecting an actual transaction. It serves as a reference or model for various business needs without involving real financial commitments or details.