Invoicing instructions

To ensure efficient operation and timely payment, Helsinki Region Environmental Services Authority HSY receives invoices primarily as e-invoices.

If the supplier does not have the possibility to send an e-invoice, the supplier may use the free Basware supplier portal. It is possible to issue and submit invoices electronically through this supplier portal. Link to the Portal instructions

Online invoicing address
OVT ID 0037227424191
Business ID 2274241–9 (EU format: FI22742419)
Intermediary operator Basware Oyj
Intermediator ID BAWCFI22

Invoicing address
Helsinki Region Environmental Services Authority
Purchase Invoices
PO Box 303
FI-00066 HSY

Things to note with the invoices

  • Subscriber reference: e-mail address in the format firstname.lastname@hsy.fi
  • Term of payment: according to the agreement, 30 days net at minimum
  • Purchase order number: 9 characters in 000012345 format or 12–13 characters in OT22HSY00045 format
  • Payment plan reference: a unique identifier provided by the customer, such as RY2152289
  • The attachments are primarily sent with the invoice. If the attachments cannot be delivered with the invoice, they must be sent in pdf format by e-mail to ostolaskut@hsy.fi. The e-mail message must indicate to which invoice the attachments in question belong.


Please note that invoices sent to the wrong address and invoices with incomplete information will be returned to the sender to be corrected. We are not responsible for the costs arising from the delay of the invoice’s payment if the invoice details are incomplete.

For more information on the electronic processing of our purchase invoices, please send us an email at ostolaskut@hsy.fi. 

 

HSY-botti