Why do some orders have 7 days and others 14?

It depends on who sold the item. When it was listed by a private user, you have 7 days from delivery to report a problem. When it was listed by a shop, which is a business account, you have 14 days.

Sold by	Buyer Protection from delivery	The user who sold is paid
A private user (a User account)	7 days	2 days after it ends: 9 days after delivery
A shop (a Shop account, a business)	14 days	2 days after it ends: 16 days after delivery

Why shops get 14 days

In the EU, a consumer who buys at a distance from a business has a legal 14-day right of withdrawal. That is why a shop's orders have 14 days. Switzerland has no general legal right of this kind, but a purchase from a shop on Tack-o-Tack has 14 days there too.

A private user is not a business, so that legal right does not apply to their sales, and the period is 7 days.

Where to see your order's date

Once the item is delivered, your order shows Buyer Protection until and the date. That date already uses your order's own period, 7 or 14 days. The period is fixed when you pay and does not change afterwards.

Withdrawing from a purchase from a shop

To withdraw from a purchase from a shop, press Contact support on the order, before the date on your order. See How do I tell you about a problem with an order?