The short answer: Proof supports three types of multi-signer transactions — co-located, concurrent, and split signing — each designed for different signer locations and setups. The last signer pays all fees, and every signer must complete identity verification individually.
Transactions With Multiple Signers
Not all signers are in the same place — and Proof is built to handle that. Depending on where your signers are located and how they'll join the meeting, there are three ways to structure a multi-signer transaction:
All signers are in the same room and join a single notary meeting together on one shared device.
Signers are in different locations but join the same notary meeting at the same time, each from their own device.
Signers are in different locations and each meets with a notary in their own separate session.
No matter which type applies, every signer must complete their own identity verification individually. Use the table below to compare each transaction type at a glance:
| Type | Physical Location | Device | Notary Meeting |
|---|---|---|---|
| Co-located | Together | Same device | Same meeting |
| Concurrent | Separate | Different device | Same meeting |
| Split signing | Separate | Different device | Separate meeting |
Mixing E-Sign and Notarization Requirements
Not every signer on a transaction needs to be notarized. With mixed signer requirements, a sender can add a recipient who only needs to e-sign a document within a transaction that otherwise requires notarization for other signers — helpful for scenarios like counter-signing a notarized document with a simple e-signature.
To use this, set each recipient's requirement individually in the transaction creation form — some can be marked as needing notarization, while others are marked as e-sign only.
Who Pays for a Multi-Signer Transaction
When a transaction involves multiple signers, the last signer is prompted to pay all required fees on behalf of everyone. This keeps things simple — once payment is received, the completed documents are immediately available to all parties.
If an organization sent you the transaction, they may cover the cost entirely. For a full breakdown of fees, read How Much Does Notarization Cost on the Proof Platform?
Summary Checklist
- There are three multi-signer transaction types: co-located, concurrent, and split signing.
- Each signer must complete their own identity verification, regardless of transaction type.
- Up to 10 devices can connect to a single meeting, with a maximum of 2 witnesses.
- The last signer pays all required fees — documents are released to all parties once payment is received.
- Mixed signer requirements let you add e-sign-only recipients alongside signers who need notarization, in the same transaction.
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