Purchase/contract orders and invoices

All goods/services/works provided to us must be supported by a valid purchase/contract order. Once we have approved a purchase/contract order, we will send you the correct purchase/contract order number. You must include this in your invoice.

Valid purchase order numbers are 10 digits long with a ‘45’ prefix.

Valid contract order numbers are 10 digits long with a ‘49’ prefix.

If you have not received your number, please contact the person you have been working with at Watercare. If your details are incorrect on the purchase/contract order, or you wish to change your bank account details, please email procurement@water.co.nz

Standard terms of purchase

Our purchase order standard terms and conditions contain the default terms and conditions that apply to all purchase orders created by us, unless otherwise agreed in a contract or within the purchase order.

Read our purchase order standard terms and conditions

Please send your invoices punctually. We need to receive invoices for the previous month by the 5th of the following month, to allow time for processing.

Here’s how you can avoid delays:

• You must include an approved purchase/contract order number on your invoice (we cannot pay invoices and may return invoices without this number).
• ​​You can send your Watercare contact a copy of the invoice (mark it clearly with the word ‘Copy’).
• Your invoice should also contain:
  • the words ‘Tax Invoice’ in a prominent place
  • your name and GST number
  • the date of issue
  • our name and address: Watercare Services Limited, Private Bag 92521
    Wellesley Street, Auckland 1141
  • a description of your goods/services/works
  • the quantity or volume of your goods/services/works.

How to send your invoice

Please email your invoice to accounts.payable@water.co.nz

If requested, please send a copy invoice to your Watercare contact.

If you are unsure whether we have received your invoice, please contact us at accounts.payable@water.co.nz

We will make payment via an electronic bank transfer into your nominated bank account.
We pay invoices on the 20th of the month following the date of the invoice, unless we set other terms on your purchase/contract order.

For example, for monthly services provided in January:

• an invoice dated 31 January and received by 5 February will be paid on 20 February.
• an invoice dated 1 February and received by 5 February will be paid on 20 March.

Please send credit notes to the same address as invoices, and clearly state ‘Credit’. 

If requested, please send a copy credit note to your Watercare contact.

If you are unsure whether we have received your credit note, please contact us at accounts.payable@water.co.nz