For suppliers

Supplier registration

As part of our procurement selection processes, suppliers and other counterparties are required to complete a supplier registration questionnaire. The information provided is used to perform vendor due diligence checks and to capture all relevant information for subsequent procurement transactions and payments. The registration form needs to be completed online at this registration link

BIS Terms and Conditions

Guidelines for invoicing

Please follow these guidelines to ensure your invoice can be registered and paid:

  • Only send invoices electronically to (do not send invoices by post).
  • Per the BIS Terms and Conditions, all invoices must indicate the PO number, or reference "No PO" where applicable, and the BIS contact person. Invoices without this information will be rejected.
  • Each invoice is a separate PDF file. The first page is the invoice, where applicable followed immediately by supporting documentation (eg Arbeitsrapport, Einzahlungsschein). No blank pages.

Credential Checking and Code of Conduct for Contractors forms

For reasons of security and to ensure that the appropriate standards of behaviour and confidentiality are upheld, all BIS contractors must sign the "Code of Conduct for Contractors" and undergo the credential checking procedure prior to starting work.

Please download, fill in, sign and submit the completed forms to the BIS by post or fax five working days prior to arrival at the BIS premises. Please be aware that access to the BIS premises may not be granted if this is not done.

Credential Checking
Code of Conduct for Contractors


The BIS fosters a culture of diversity, inclusion, sustainability and social responsibility. We aim to conduct business with suppliers who share these values. We may ask suppliers for information to help us understand their values and practices and we may require them to address concerns. Our suppliers must comply with the laws, ordinances, rules, and regulations bearing upon the performance of their obligations toward the BIS. We encourage our suppliers to promote sound environmental practices in their operations and to seek possibilities to reduce emissions, pollution and waste in their work for the BIS.