Test both sides of a marketplace with test accounts

Testing both sides of a marketplace

Almost everything in a marketplace sends an email to someone else: an order to the seller, a reply to the buyer, a review request to both. You can only check those with an account on each side, signed in at the same time.

Updated October 13, 2026

The accounts you need

Account	Side	What it checks
Seller	Lists items, rooms or services	Listing approval, new-order and message emails, payouts
Buyer	Buys or books	Order confirmation, messages, updates and review requests
Second buyer	Wants the same thing	Stock and double-booking rules, and “no longer available” emails
New seller	Just signed up	Onboarding, checks and any limits on new sellers
Moderator	Admin or support	Reports, disputes and takedowns, and the emails they trigger

Set them up

Create the set in one go: choose Add account, set How many, label the batch “Marketplace” and tick Generate persona.
Sign up as each and finish seller onboarding with test details on staging.
Tag each address with its side, such as buyer, seller or moderator, and save its password on the address.
Open two browser profiles side by side, one for the buyer and one for the seller.

What to check

Orders: an order or booking reaches the seller at once, and the buyer’s confirmation matches it: item, price, dates.
Messages: a message reaches the other side by email when they’re away, without showing either person’s real email address if your marketplace hides them.
Stock and calendars: two buyers can’t take the last item or the same slot.
Cancellations, refunds and disputes tell both sides the same facts.
Reviews: both sides are asked once, after the order is complete, and not before.

The emails to check

For the seller: new order, new message, payout and review received. For the buyer: confirmation, shipped or booked, new message, refund and review request. Open both inboxes after each step and check they tell the same story.

Use these accounts only on a marketplace you build or are allowed to test, in development, staging or QA.

Try it on your next sign-up test

Free plan, no credit card. Create an address and watch the code or link arrive.

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Questions

How do I sign in as buyer and seller at once?

Use two browser profiles, or a normal and a private window, one signed in as each. Each account's emails land on its own row in Proxy Mail QA, so you can follow a conversation from both ends.

How many accounts do I need?

Usually four or five: a buyer, a seller, a second buyer for competing orders, a brand-new seller, and a moderator if your marketplace has one. The same set works for hosts and guests, clients and freelancers, or drivers and riders.

Can I test payments and payouts?

Use your payment provider's test mode on a staging copy of your marketplace. The order, payout and refund emails your app sends arrive like any other.