Kindful will print your return address and organization name/image on all envelopes you print by default. If you happen to have envelopes with this pre-printed on them, read this article to see how to disable this setting from your Kindful envelope exports.
If you are using Kindful to print your envelopes and already have pre-printed envelopes with your return info/logo on them, or you simply want a clean envelope to print on, you can disable the function of printing your return address and logo easily.
Go to Settings > General Settings. In the Communications box, mark the checkbox to hide the logo and address on your envelopes.