As part of our compliance and vendor setup process, ButterflyMX provides a current W-9 form to U.S. customers who require our taxpayer information for their records or payment processing purposes. Below you’ll find details on how to access the form and where to send payments.

Q: How can I obtain ButterflyMX’s W-9 form?
A: Our W-9 form is available for download here: ButterflyMX W-9 Form (PDF).

Q: Which address should I use for payments?
A: Please note that the address listed on the W-9 form is our legal business address, as registered with the IRS.

For remittance purposes, we kindly request that all payments be sent to our designated remittance address below:

Remittance Address

• For USPS check payments:

ButterflyMX, Inc.

P.O. Box 718715

Chicago, IL 60677-8715

• For FedEx or UPS check payments:

PNC Bank c/o ButterflyMx, Inc.

Lockbox Number 718715

350 East Devon Ave

Itasca, IL 60143

Q: How often is the W-9 updated?
A: Our W-9 is updated whenever our company information changes (e.g., address, legal entity, or tax ID). Please use the link above to ensure you always have the latest version.