HSMP Extension - Online Payslips

My company issues payslips online, they dont issue signed paper pay slips.

Is it enough if I submit the following as proof of earnings?:

(1) Print out of online payslips (not signed)
(2) Bank's credit advises for salary payments (This appear to be a computer generated, it looks like photo copy)
(3) Monthly Bank statements on Banks letter head, which also shows salary credits

Since one year is not completed, tax assessment is yet to be done.
Can I send a letter to the tax office about the income, and attach this letter with my Extension form?

Even Mine does, & I get paid weekly thru my umbrella company
But i requested them for paper copies signed and stamped and told them that its a REQUIREMENT by the HO.. if they need any further clarification, then they can contact the HO liason office
I did this at 11:00 am, and Pronto the next day at 9:00 i had 40 printed wageslips all stamped and signed