The donation form will need to include a proxy URL argument to achieve this.  This will need to be appended to the end of the donation form url: &PROXY_ID="TeamRaiser Event ID"&PROXY_TYPE=21.

Note: Proxy arguments are case sensitive and must be in all caps otherwise it will credit the gift toward the donation form and towards the event.

Incorrect Format:  &proxy_ID=1234&proxy_type=21
Correct Format:   &PROXY_ID=1234&PROXY_TYPE=21