If you want to purchase something using Klarna’s Pay in 30 days, you'll need to share your phone number, email address, current billing address and your credit or debit card details. If Klarna needs to talk to you urgently they'll use the phone number you've shared. For any other information Klarna needs to share with you, they'll send this to your email address.
Klarna - Pay in 30 Days
What do I need to provide when I make a purchase?
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