Thank you very much for your advise. I asked them what they meant with the leave stamps but they have not replied yet. So I sent them a scanned copy of my passport including the pages of the stamps I have from my previous visit to Canada. I think they are talking about the UK entry stamp The Station ...

Hi! I am applying for a Tier 5 visa as a temporary worker in the UK. The company is about to generate my certificate of sponsorhsip. But they are asking me for a copy of my passport. That is not a great deal but they are telling me to also send them copies of my passport pages showing "leave stamps ...