# Identifiers assigned by Gemini ### Identifiers | Tag | Name | Defined In | Description | | :-: | ------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | 49 | [SenderCompID](https://www.onixs.biz/fix-dictionary/4.4/tagNum_49.html) | [Standard Header](/trading/fix/overview/standard-header) | Assigned value used to identify the message is sent from Gemini to the client, `GEMINI` | | 56 | [TargetCompID](https://www.onixs.biz/fix-dictionary/4.4/tagNum_56.html) | [Standard Header](/trading/fix/overview/standard-header) | Assigned value used to identify the firm receiving the message, e.g. `CLIENT-DC` | | 571 | [TradeReportID](https://www.onixs.biz/fix-dictionary/4.4/tagNum_571.html) | [Trade Capture Report ``](/trading/fix/drop-copy/client-bound-messages/trade-capture-report) | Globally unique event identifier | | 448 | [PartyID](https://www.onixs.biz/fix-dictionary/4.4/tagNum_448.html) | [Trade Capture Report ``](/trading/fix/drop-copy/client-bound-messages/trade-capture-report) | The party that placed the trade.

- For FIX sessions, the CompID of the sender
- For API sessions, the session identifier (which is the API key of the sendder)
- For orders placed on the website, `UI` |