I need my proof of purchase for iPhone XR

Welcome to the Apple Support Communities.

If you purchased your iPhone from Apple, see: Viewing & Changing Orders - Shopping Help - Apple.

If you purchased your iPhone from a third-party, see: Contact a third-party vendor - Apple Support and ask them.

Jack

Where did you purchase this iPhone from? If you purchased this iPhone directly from Apple then 👉  Apple Support

If you purchased it from somewhere else, then contact that seller.

Axel F.

Please contact 👉  Apple Support

Axel F.