Supplier Information


Register by email invite only

We have partnered with Coupa to deliver an ordering and invoicing platform to our suppliers. Coupa is an intuitive and user friendly system that provides greater visibility into purchase orders and invoices — at no cost to you.

If you are a supplier who is interested in doing business with Members 1st, please complete and submit the Supplier Profile form. Note that completion and submission of this form does not guarantee a potential new supplier will be selected to do business with Members 1st.

Below are reference guides to help you get started:

  • Getting Started on the CSP — A step by step guide on signing up for the CSP, entering remit to addresses, adding users to your profile, and how to navigate the portal.
  • Invoicing via the CSP — Submitting electronic invoices is simple and intuitive! This guide will show you how to view your purchase orders, flip from a PO to an invoice, and check on payment statuses.
  • CSP Videos — Coupa Success Portal. Watch short video tutorials for quick help on using the CSP.

Request email Invite

Become a Member

Looking to join our credit union? Not sure how it all works? No problem—it’s far easier than you imagine. At Members 1st, we are always seeking new members to join our family, and we have a number of flexible options to make the eligibility process simple and fun.

Open an account

Please be aware that by continuing you will be leaving and viewing content from another website.

For your protection please be advised that public Internet email is not secure. Various links within our web site allow you to submit information to us by public Internet email. Please DO NOT provide personal or account information through public email or submit any personal information that would compromise your identity including your account number, social security number, credit card numbers, electronic services PINs, passwords or mother's maiden name. Members 1st will not respond via public Internet email to requests-for-account-information or account activity. Please contact Customer Service with these types of requests at (800) 237-7288 or (717) 795-6049.