they sent me an email to request and mention that they want to see it and work o ...
That might not be the real reason, to work out the best package they would only need to know the latest not necessary need to SEE the recent three slips.
they asked me to provide it after interview. they sent email to me.
ask them to do reference check la, don't they have HR department?
Did you provide reference letter from your previous job, some comapny will state last working date and last salary