An e-invoice should be created after a product is sold or a service is provided. This ensures all transaction details, like amount and service description, are captured accurately. The e-invoice is then sent to the customer's email or through an online system. Sending e-invoices promptly helps in getting faster payments and keeping financial records up-to-date.

Businesses that are part of certain e-invoicing networks are required to make e-invoices. This usually includes companies engaged in B2B (Business to Business) transactions. Governments in some countries also mandate e-invoicing for public sector transactions. The requirement for e-invoicing can vary based on the country's regulations and the company's business practices.

Electronic invoices generally do not require a traditional handwritten signature. They often use digital methods to verify authenticity and integrity. This can include digital signatures or unique identification codes. The specific requirements can vary depending on the country's laws and the business sector.

To check the status of an e-invoice, log in to the e-invoicing platform you used. Look for a section like 'Invoice Status' or 'Transaction History'. Here, you can see if the invoice was sent, received, or paid. Some platforms also send notifications or updates about your invoice's status.