When an order is marked complete, most marketplaces treat the transaction as final. For digital goods — where a subscription can silently lapse or a key can be revoked days later — that is far too early to walk away.
What the window actually does
For ten full days after completion, the buyer can still open a report. The seller's payout reserve covers any refund issued in that window, so funds are always available without clawing back money the seller has already withdrawn.
Why ten days
It is long enough to catch the most common failure modes — revoked access, region locks, shared-account lockouts — and short enough that sellers are not left exposed indefinitely. The reserve and the window are tuned together.