Checkout is where the money is and where testing is rarest, because staging a purchase feels harder than it is. The result is that most teams know their abandonment rate to two decimal places and nothing about its cause.
What to put in the public brief
- That it is an e-commerce checkout, and the rough product category
- Desktop or mobile, explicitly
- Roughly how long it should take
- That a screen recording is required
- That no real money will be spent
Keep the store URL, the test card, and any coupon private. A public brief containing a working discount code is a discount code in public.
What to put in the private instructions
Give the store link, the test card and the coupon
State clearly which of them is the intended path, so the tester is not choosing between three options you meant as one.
Say where to stop
"Stop at the order confirmation screen and do not refresh." Ambiguity here is what produces real orders you then have to refund.
Give them a goal, not a route
"Buy something you would actually want under thirty dollars, in your own size." A tester following your click path cannot find the step where a real customer would have hesitated.
Ask what they expected at each pause
The gap between what the screen did and what they expected it to do is the entire finding.
Proof worth requiring
Ask for
The full screen recording from landing to confirmation, the device and browser, and one sentence on the moment they were least sure it was working.
Do not ask for
An order number as the only evidence. It proves a purchase completed and tells you nothing about the four minutes before it, which is the part you are buying.
When this task type is the wrong tool
If you already know the drop-off screen and want to compare two versions of it, run a first-impression test on each version instead — it is faster and isolates the change.
If checkout fails only for a payment method or a country you cannot simulate, no amount of testing substitutes for targeting the campaign at people who are actually in that market.