> For the complete documentation index, see [llms.txt](https://docs.saturnbtc.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.saturnbtc.io/saturn-v1/faqs/what-is-a-psbt.md).

# What is a PSBT

A PSBT, or Partially Signed Bitcoin Transaction, is a standardized format for Bitcoin transactions that aren't fully signed yet. It provides a way to work with transactions that might require multiple signatures or other processes before they're finalized and broadcasted to the Bitcoin network.\
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Thanks to PSBTs we are able to sent orders and bids without the need of a smart contract enabling decentralised P2P order books.