A publisher is requesting my Art19 decryption key. Do I send it?

No! Your Art19 decryption key should not be shared with others. This key decrypts IP address information from the Art19 pixel for dynamic campaigns, which can be used for Chartable attribution.

The publisher you're working with should create an external SmartPromo approved on your dashboard, so you can add the decryption key on your Chartable dashboard. Read more here -- https://help.chartable.com/article/226-art19-decryption-key-for-smartprom