# Standard Trailer

The [Standard Trailer](https://www.onixs.biz/fix-dictionary/4.4/compBlock_standard-trailer.html) is required on every message.

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### FIELDS

| Tag | Name                                                                | Req | Description                                                          |
| :-: | ------------------------------------------------------------------- | :-: | -------------------------------------------------------------------- |
| 10  | [CheckSum](https://www.onixs.biz/fix-dictionary/4.4/tagNum_10.html) |  Y  | Three-byte, simple checksum. Always the **last tag** in the message. |