The best of non-profit advertising and marketing for social causes

Social offline: I got an envelope

Social offline: I got an envelope


1. Write the following message on the back side of an envelope:
“Dear finder, put something personal inside the envelope and then return it to me. Be as original and artistic as possible and the content of the envelope will be submitted to”
2. Write your address and put a valid stamp on the envelope.
3. Leave the envelope in a public place and wait for its return.
4. Take a close-up picture of the content, or scan it, and email it at


Founder of Osocio. It all started with collecting election posters in 1973. And that's never stopped. Read more.
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