olemus
arvete koostamine ja/või väljastus

Wiktionary:
invoice, verb
1. (transitive) to bill; to issue an invoice to
2. (transitive) to make an invoice for (goods or services)

ülevaateid
https://www.xero.com/us/guides/awesome-invoicing-process/

https://www.mooninvoice.com/blog/invoicing-process/