1. Issuance of Invoices
Invoices must be issued in a timely manner upon the delivery of goods or completion of services, or as contractually agreed.
All invoices must include: 

• Invoice number and date 
• NSWERS name and remittance address 
• Description of goods or services 
• Amount due and payment terms 
• Contact information for billing inquiries 

2. Approval Documentation
All invoices must be reviewed and approved by the Executive Director or designee prior to issuance. Supporting documentation (e.g., contracts, service agreements, delivery records) must be retained in accordance with NSWERS recordkeeping policies. 

3. Payment Terms
Standard payment terms are net 30 days from the invoice date, unless otherwise stipulated in a formal agreement. Late payments may be subject to penalties or interest as outlined in the agreement or as determined by the Executive Council. 

4. Reissuance and Corrections
Any corrections or reissuance of invoices must be clearly marked as such and must reference the original invoice number. Credit memos may be issued in cases of overbilling or canceled services, subject to appropriate approvals.

5. Tracking and Reconciliation
All invoices shall be tracked through the NSWERS accounting system. The Executive Director or designee shall monitor outstanding invoices and initiate appropriate follow-up communications for accounts past due, including reminders and escalation to the Executive Council as needed.