140 / 500P2EP

PayJoin

An interactive payment in which sender and receiver both contribute inputs, weakening common ownership heuristics.

An interactive payment in which sender and receiver both contribute inputs, weakening common ownership heuristics.

An interactive payment in which sender and receiver both contribute inputs, weakening common ownership heuristics. This coordinate is placed in the wider system through its protocol, economic and historical relationships.

Understanding PayJoin helps distinguish a verifiable Bitcoin mechanism or historical record from slogans, products and market narratives.

01

Linked to related atlas coordinates

02

Grounded in a source record

03

Explains function and trade-offs

04

Part of the open Bitcoin knowledge graph

DOC · 001BIP78 — PayJoinSpecification
Reviewed 25 July 2026Source-first · No investment advice