Vendor Onboarding Guide

Creating your Mainstreamed Marketplace account is quick and easy. Follow these steps to get started!

• Open your web browser and go to www.mainstreamedmarketplace.com.
• Click "Sign up" in the top-right corner of the page.
• On the Sign-Up screen, click the "User type" dropdown and select "Provider"
• Fill in your email, first name, last name, and how you’d like your name to be displayed on your store.
• Create a strong password (at least 8 characters, mix of letters and numbers).
• Click the box next to "I accept the Terms of Service and the Privacy Policy." Click the links to read each document before accepting.
• Click the "Sign up" button.
• Check your email inbox for a verification email from Mainstreamed Marketplace. Click the link inside to confirm your account.

Once verified, log back in at mainstreamedmarketplace.com and you're ready to set up your store!

• Log in to your Mainstreamed Marketplace account.
• Click your profile icon with your initials in the top-right corner.
• Select “Profile Settings" from the dropdown menu.
• Upload a profile photo (recommended: 400×400px, square, JPG or PNG, under 2MB). Tip: use a clear headshot or your business logo!
• Fill in your first name, last name, and display name. The display name is what customers will see when they go to your page – so you may want to put your business name here!
• Complete your bio. This is where you can share your story! A complete, professional profile builds buyer trust and helps customers learn who you are and what makes your business special. This is also where you should set your store policies for returns. Clearly state whether you accept returns, within what timeframe, and in what condition. Any accessibility related information may also be relevant here.
• Make sure to click “Save changes” when you are done.

To receive payments from your sales, you'll connect your bank account through Stripe — a secure, industry-leading payment platform. You must connect your Stripe account to your profile to perform transactions. This is required before your listings can go live and accept orders.

• From your profile icon in the top right corner, click "Account Settings”
• Click “Stripe Account” on the bottom left. You can connect to Stripe within the Mainstreamed Marketplace UI, so follow the prompts to fill in your payout and business details.
• Make sure to choose a statement descriptor that accurately describes your business name. This will be what appears on your customers’ bank or credit card statements.
• Review Stripe's Terms of Service and click "Agree & Submit."
• Make sure that you see “Your Stripe Account is up to date!” on your Stripe Account tab before proceeding. Funds from your sales will automatically be transferred to your bank account on Stripe's standard payout schedule (typically 2–7 business days after a completed order).

Important Note: Stripe is a third-party service. Mainstreamed Marketplace does not store your bank details — all financial information is securely handled by Stripe. If you have questions about Stripe's process, visit stripe.com/support.

Mainstreamed Marketplace does not provide legal or tax advice. Vendors are responsible for understanding and complying with all applicable tax laws and registration requirements related to their business.

All transactions will be processed using the vendor’s connected Stripe account, meaning the vendor is the merchant of record for all transactions. As a result, vendors are responsible for understanding and complying with all applicable tax laws, registration requirements, reporting obligations, and tax filings related to their business.

Your connected Stripe account must have:

• A valid US head-office state configured
• An active sales tax registration in that state
• Product Tax Codes

If tax readiness requirements are not completed, customers will be unable to complete purchases from your store. Listings will use product tax codes to help Stripe calculate taxes correctly. If a product tax code is missing, Stripe will automatically fall back to a default tax code. All of these requirements can be set up on the Sales tax tab of your vendor dashboard.

Vendors are responsible for:

• Sales tax registration
• Tax compliance
• Tax filings and remittance
• Maintaining accurate tax information in Stripe

Requirements vary depending on your business location, where you sell, product type, and sales activity. If you are unsure about your obligations, consult a CPA, tax professional, or your state’s Department of Revenue before launching your store.

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