For legal reason, in our company, to validate a sale we need our customer to print and stamp their quotation or purchase order,perform payment and send us payment slip to validate them.
I need to implement a file uploader where the customer receiving his quote/purchase order can upload those documents in our erp so it can be attached to purchase order and be tracked accordingly.
Typically when the customer receive the email with the quotation and is invited to View Quotation it land in myorder/order_number I would like to have this uploader on this page and trigger the sales confirmation at this time.
what is the best way to process to implement such uploader ?
Electronic signature will do the thing if you need only a signature from the customer end