Supported services The supported services available through Sterling eInvoicing are: Invoice Signing, Invoice Validation, and Archive and Audit Services. Invoice signingSignature services from IBM Sterling e-Invoicing provide for the digital signing of an e-invoice, and include checking for duplicate invoices.Invoice validationIBM Sterling e-Invoicing validation services provide for the validation of signed invoices.Archive and audit servicesWith IBM Sterling e-Invoicing archive and audit services, a signed or validated invoice can be archived for future auditing by your company, local tax authorities, or tax authorities in clearance countries.Parent topic: IBM IBM Sterling e-Invoicing