The phrase "to support the documents" means to provide evidence or information that confirms or backs up the information stated in the documents. Full definition
The main duties of accounts payable clerk involves record keeping and timely submission of supporting documents for purchase transactions by company. (resumetemplate.org)
The reimbursement claim form should be filled and submitted along with supporting documents in original. (policybazaar.com)
The plaintiff must include a number of supporting documents with this affidavit and serve it on the potential defendant before filing the lawsuit. (garvinlegal.com)