| Name | String | Receiver's name |
| Email | String | Required. Receiver's email address |
| Language | enum: de-DE en-US es-ES fr-FR it-IT pl-PL nl-NL | Language for receiver communications |
| Subject | String | Custom subject for notification email. Maximum of 64 characters allowed. Omitting this parameter will enable the default subject. |
| Message | String | Required. Custom message for notification email. Newlines can be created by including a \n in the message. HTML is not allowed. |
| Reference | String | Custom reference for this receiver |
| Context | Object | Custom receiver data (JSON object only) |