It sounds as though you may be better off speaking to your local chamber of commerce who would be best suited to advise you on international trade options. You can find details of your local chamber by using the 'Chamber Directory' option under the 'About' drop-down in e-z Cert World.
In regards to your specific question, then I can confirm that the chamber would need back up evidence to be sent through to them, and this can be done by uploading a PDF of the document electronically (and securely) using e-z Cert. Again, this is something that can be discussed in more detail with a representative from your local chamber.
I hope this points you in the right direction,
The i2i Helpdesk