Is it necessary to book a flight when I buy something at an online duty-free shop?

internet-duty-free-shop plane reservation

I definitely decided to go on a trip to Japan in April, but I haven't decided on a date yet. I heard that the cosmetics I applied for restock came in, so I was wondering what I should do before I book a flight at the Internet duty-free shop

1102 2018-03-15 Lady

A. 1

I have to put my passport number and flight number when I buy it, so I can't do that

Lady 7 years ago 0

A. 2

You can put in your passport number, and then change your flight number later

Lady 7 years ago 0

A. 3

@2 I recommend this method, too

Lady 7 years ago 0

A. 4

Thank you!

Lady 7 years ago 0

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