Finance and accounting

Ideally, you should send an invoice before payment to establish clear expectations and professional standards, but certain situations or industry practices may dictate otherwise; it's essential to consider the nuances of your specific business context.

The answer lies in a tactful blend of clear communication, systematic tracking, and understanding legal boundaries. But, determining when to switch from a soft reminder to a firmer approach, or how to automate the follow-up process without losing a personal touch, requires a closer look.

The short answer is, it depends on jurisdictional requirements and the specific circumstances of the transaction, but generally, a signature is not mandatory for an invoice to be valid. Including a signature on an invoice can add a layer of seriousness and formality that might facilitate payment processes – but there are effective alternatives leveraging modern technology.