You must apply for your digital certificate through the same computer from which you are going to make your efforts online. In addition, you should use the same browser during the whole process (Explorer 7 - 8 or Mozilla Firefox)

• You cannot format the computer while the Digital Certificate is in effect, unless the Certificate is exported.
• At the time of requesting the Certificate, you must use it from the same computer, with the same user and the same browser.
• In addition, it is advisable not to make updates on the equipment during this process.

You must apply for your digital certificate through the same computer from which you are going to make your efforts online. In addition, you should use the same browser during the whole process (Explorer 7 - 8 or Mozilla Firefox)

Remember that you can request the renewal of your Certificate during the two months before the expiry date, So you don't have to be re-registered at the registration office.

Do not use backup of your certificate along with the private key and keep it in a safe place. No disclosures to no one private key.

For all the options to appear on the Client Signature, go to Tools > Options > General, select the option enable advanced settings options > all options will be displayed, including Massive Signing. With this option you will be able to counter-sign or make a cascading signature.

To be able to see in PDF your digital signature information and content you've signed, you'll have to choose the format PAdES when you sign with the @signature app.