https://www.mlsnow.com/pdf/AttributionListing.pdf
Brokers have selected the attribution contact defaults for their office listings.
If Agent Overrides are allowed, the Matrix Input Screen – Agent Info tab will display what the broker default selection and display a box for the agent to enter different contact information if desired.
Note: If Agent Overrides are not allowed, below Attribution Contact Override you will see ~NOT ALLOWED and you will not be able to change the attribution contact for listings.
NAR Internet Data Exchange (IDX) Policy Statement 7.58 and VOW Policy Statement 7.91: IDX and Vow Broker Attribution. Require that participants’ IDX displays must identify the listing firm and an email or phone number provided by listing participant in a reasonably prominent location and in a readily visible color and typeface not smaller than the median used in the display of listing data. The same standard would also apply to VOWs but is optional.