If you are creating the files using EPDM Templates, then you can easily use different Serial Numbers on each form. Work Order will have its own template with its own serial number and Contracts will have their own.
If you don't know how to use templates, let us know and we'll hopefully walk you through it. It's got several steps with its own quirks, but it works great for creating different documents of the same file type.
Thanks for your reply.
Some more guidance as to how to created these templates would be great. I have already created my file structure so it would just be incorporating templates.