Company A offers a network to business clients wishing to exchange invoice and remittance information...

Company A offers a network to business clients wishing to exchange invoice and remittance information amongst themselves. During the course of business, Company B on the network complains that it is not receiving payments from its clients on the network, who, in turn, claim they are not receiving invoices from the company. What information security practice did Company A NOT ensure was in place to prevent realizing this technology risk?