It's ambiguous, nonetheless. It's clearer to say "When Jane retired, her manager gave her a lovely [leaving] present".
We can't assume that every culture is the same. I learnt that quite fast when I taught in Madrid. I found out in advance that one of my students had a birthday on a day we had a lesson. As would be the done thing in the UK, I bought her a birthday card and a small cake on the way to the lesson. When I arrived, I was very surprised to see a box of cakes already on her desk. I assumed her colleagues had bought them for her. However, she then told me that in Spain the person celebrating their birthday buys cakes for everyone else! Also, they don't do birthday cards (which explained why it was so hard for me to find one!)