Because the standard says so.

https://eips.ethereum.org/EIPS/eip-721

/// @dev This emits when ownership of any NFT changes by any mechanism.
///  This event emits when NFTs are created (`from` == 0) and destroyed
///  (`to` == 0). Exception: during contract creation, any number of NFTs
///  may be created and assigned without emitting Transfer. At the time of
///  any transfer, the approved address for that NFT (if any) is reset to none.
event Transfer(address indexed _from, address indexed _to, uint256 indexed _tokenId);
Answer from William Entriken on Stack Exchange
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Stack Exchange
ethereum.stackexchange.com › questions › 126573 › erc721-is-being-minted-to-null-address
truffle - ERC721 is being minted to null address - Ethereum Stack Exchange
April 20, 2022 - So you might want to test further to figure out why? BalanceOf, total Supply, did the Mint happen correctly? ... I think your problem is here, the firstMinter is still haven't own the NFT yet before deployed tokenID 1, so the firstOwner is null.
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Reddit
reddit.com › r/ethereum › null address holds newly minted tokens?
r/ethereum on Reddit: Null address holds newly minted tokens?
December 30, 2021 -

Hey! I am trying find out who is holding the game specific nfts on etherscan. While searching, I saw null address that holds nfts. Then, I searched online and it happens to be that somebody accidentally sent to wrong address. However, when I looked at the inventory of null address, I saw these are newly minted nfts and there is no other transaction. On the transactions it says nft is transferred to some other addresses however I can't find the tokens on those addresses as well. I feel lost now, any explanation is highly appreciated. Thanks in advance!

Inventory of null address

Example transaction

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GitHub
github.com › hashlips-lab › nft-erc721-collection › discussions › 254
Minted NFTs showing as owner "null address" · hashlips-lab/nft-erc721-collection · Discussion #254
Also the total collection amount does display correctly on rarible. For some reason the owner of the token IDs minted on the 3500 original mint show a mix of the correct address and null addresses.
Author   hashlips-lab
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Etherscan
etherscan.io › address › 0x0000000000000000000000000000000000000000
Null: 0x000...000 | Address: 0x00000000...000000000 | Etherscan
This address is not owned by any user, is often associated with token burn & mint/genesis events and used as a generic null address
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OpenSea
opensea.io › item › ethereum › 0x3eb9ee21d5d7f37d53de0213cb7058fb27eabde9 › 2
Post-Death or The Null Address #2 - Olive Allen - 1:1 Artworks | OpenSea
‘Post-Death or The Null Address' is depicting the NFT afterworld — 0x0000000000000000000000000000000000000000 address or the burn address. In theory, burning an NFT effectively destroys the token and removes it entirely from the Ethereum ...
Find elsewhere
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Moralis Web3 Forum
forum.moralis.io › technical issue reporting
Minter_Address not populating for NFT minted on Sepolia - Technical Issue Reporting - Moralis Web3 Forum - Largest Web3 Dev Community 📈
January 24, 2024 - We just noticed single NFTs minted are now returning a null Minter_Address whereas two months ago it would correctly return the address that minted the NFT. We are using the same contract as two months ago, so I don’t s…
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Wordpress
ethblogging.wordpress.com › 2021 › 12 › 30 › null-address-holds-newly-minted-tokens
Null address holds newly minted tokens? – Ethereum & CryptoCurrency Blogging
December 30, 2021 - While searching, I saw null address that holds nfts. Then, I searched online and it happens to be that somebody accidentally sent to wrong address. However, when I looked at the inventory of null address, I saw these are newly minted nfts and there is no other transaction.
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MetaMask
community.metamask.io › support › sending and receiving tokens
Transferring a token to the NULL address - Sending and Receiving Tokens - MetaMask
July 7, 2021 - Rarible and OpenSea have blocked transferring a token to the NULL address and they refuse to talk about it or answer any questions… If i transfer a token from within the MetaMask app to the NULL address is it equal to bu…
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Reddit
reddit.com › r › OpenSeaNFT › comments › pb40ks › minted_shows_null_address_surefire_way_to_know
r/OpenSeaNFT - Minted shows Null Address / Surefire way to know NFT is successfully minted (xpost from /r/opensea)
August 25, 2021 - 14.6k members in the OpenSeaNFT community. The OpenSea NFT subreddit is a gathering for those interested in Non-Fungible Tokens (NFT) on OpenSea …
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Curious
curious.xyz › answers › 876
[NFTs] - Can I view my NFT on OpenSea if I minted it on Rar...
If you've paid the gas fees for minting then it will show up on other marketplaces as well but if you've listed it for free means you've used lazy minting then it will not show up. Moreover, if you've used the lazy minting it will show up null address if you will go into the details and if you've paid for the gas fees it'll show you the blockchain address...
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Blockscout
blog.blockscout.com › minted-nft-not-showing-how-to-verify-onchain
Minted NFT not showing up? Here’s how to verify it onchain
March 19, 2026 - To understand why, we need to unpack what this “from” address actually represents. The address 0x0000000000000000000000000000000000000000 is known as the null address, or zero address.
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Education Ecosystem
educationecosystem.com › home › what is the null address in crypto?
What is the Null Address in Crypto? Null Address in Crypto
January 3, 2022 - However, the tokens sent to the null address will never be used. Coin burning is a process where crypto miners and developers remove a specific portion of coins from circulation to control their price.