According to the Universal Postal C

According to the Universal Postal Convention in the General Rules applicable to the international postal service is written:
1) any mail belongs to the sender until it was handed to the recipient, unless it has been detained under the laws of the country or destination.
2) The bearer of the postal may withdraw it from the post office, change or correct the address. Tariffs and other conditions set out in the Regulations.
From the above written I have a question: If I have not received my order before that time, maybe the seller has withdrawn this it back?

Результаты (английский) 1:

According to the Universal Postal Convention in the General Rules applicable to the international postal service is written: 1) any mail belongs to the sender until it was handed to the recipient, unless it has been detained under the laws of the country or destination.2) The bearer of the postal may withdraw it from the post office, change or correct the address. Companies and other conditions set out in the Regulations. From the above written I have a question: If I have not received my order before that time, maybe the seller has withdrawn this it back?

Результаты (английский) 2:

According to the Universal Postal Convention in the General Rules applicable to the international postal service is written:
1) any mail belongs to the sender until it was handed to the recipient, unless it has been detained under the laws of the country or destination.
2 ) The bearer of the postal may withdraw it from the post office, change or correct the address. And other conditions Tariffs set out in the Regulations.
From the above written I have a question: If I have not received my order before that time, maybe the seller has withdrawn this it back?