Can an employer force employee to pay for damages in customers home?

I work for a sub-contractor delivery service that delivers and installs home furniture for a name brand furniture company. I am now being told there are 3 claims for damages in customers’ homes and I am being partially held responsible. My employer means to dock my pay to assist in paying off the costs. I am just a helper and am working off the books. My employer was present on all occasions along with our driver. The damages occurred within the scope of my job duties. Am I in anyway liable? Please help.