Is there any arbitration practice in the sphere of e-documents?

Yes, it is. For example, FAS of Volgo-Vyatsky district admitted legal force of an e-document signed with digital e-signature (Decree dated August, 11th in case N А43-5226/2010). The claimant required to recover debt from defendant for unpaid goods. Defendant did not want to admit e-documents signed with digital e-signature, and announced that they were not signed by authorized person. Court ascertained that documents had been issued in compliance with the requirements, and parties entered an amendment to the contract stating use of electronic document flow with digital e-signature for source documents. Signer digital e-signature certificate was submitted to the court. So, court lawfully decided that source documents had been signed duly, by defendant authorized person.