diff --git a/en/lesson-02.md b/en/lesson-02.md
index dd9cb83e..0aeb4db4 100644
--- a/en/lesson-02.md
+++ b/en/lesson-02.md
@@ -69,6 +69,12 @@ can edit our examples using [Overleaf](https://www.overleaf.com), one of the
 major websites for LaTeX online. There are of course others:
 [Papeeria](https://papeeria.com/) is an example.
 
+## Working with others
+
+If you are planning to send your LaTeX sources to destinations which process
+them, such as publishers, conference organisers or pre-print servers
+(e.g. arXiv), you should check what restrictions they impose.
+
 ## Exercise
 
 Get yourself set up with a local LaTeX installation _or_ an account with