# Transaction types

* **Standard Transaction Types**: Xumm accepts all mainnet XRPL transaction types.
  * Exception: Transaction types for non-voted in amendments may be unavailable
  * Payment Channel signature types (non-transaction, receipt) are not yet supported (to be added in Xumm 2.5.0)
* **Pseudo-Transaction Types**: One pseudo-transaction type: `SignIn` - [User identification payloads](/environments/backend-sdk-api/user-identification-payloads.md)
* **Limited Transaction Types:**: Some transaction types, such as setting a Regular Key or setting a Signer List (multisign), require special permission for user security reasons:
  * Setting a Regular Key
  * Setting a Signer List (multisign)


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