Dave, I dont know how far these invoices go back, but if its more than 3 months then they are not making a quarterly declaration to the cis. Every three months, my accounts lady trots along and says your CIS is due and its going to be XXXXX...after I have passed out and had a dose of the smelling salts, I then see them collect the money on a direct debit. We send out the subbies tax certificates every 3 months because you lads seem to lose them if they are done every month.
Your way forward is this, if these invoices are for more than 3 months, you immediately ring the company and inform them you are ringing your tax office and informing them that you have received no tax certificates, and the name of the company concerned. The company concerned should then spring into action. And the reason is this, they might be on a CIS gross status, and if they lose that status, its like a kiss of death, because in turn the main contractor will withhold 20% on their invoices.
What goes around goes around.
Good luck, take no prisoners and get on that phone.
Let us know what happens.
Lynn