Certificates
- You need these digital certificates to read Invoices which have been digitally signed by the OB10 system (in HTML email or other signed formats)
- Choose a format which works with your computer, download the zip file and install all three certificates
- Instructions for Internet Explorer
- Open each certificate file
- Press Install Certificate
- Press Next, Next, Next until each certificate is installed
- Once you have installed the Identrus-Root, RBS-Identrus and OB10-RBS certificates, a chain is established from the root certificate to the certificate used to digitally sign OB10 invoice data, emails or images
For use post June 2006
PKCS-OB10Chain
For use pre June 2006
Base64Format.zip
DER Format.zip
PKCS Format.zip
Signature Files in Germany
- You need to use SecSigner to verifiy the signature accompanying invoices issued from Germany
- Click the links below to download the SecSigner application and instructions for use
SecSigner.exe
Instructions for installation and use


