Securely handling e-mails

Our e-mails always include a digital signature, so you can be sure the e-mail really has come from PostFinance. Read here what to look out for when handling e-mails.

Protect yourself from fraudsters by

  • clicking on the icon (seal, envelope, or tick) and verifying the signature
  • if you receive an unsigned e-mail with PostFinance as the sender, call the Contact Center
  • do not open e-mails from unknown senders, and delete suspicious messages
  • never click on links or download attachments if you don’t know the sender
  • never follow a login request or reveal any data – call our Contact Center immediately if you have disclosed confidential data or opened a suspicious attachment
  • At PostFinance, security is paramount, including when it comes to e-mail.

    Signed e-mails

    PostFinance signs all its outgoing e-mails with a digital signature. This confirms that the e-mail was sent by PostFinance and has not been modified since being sent. Most e-mail programs, such as Outlook, Windows Mail, Thunderbird,, support digital signatures and depict them with a seal, sealed envelope, or a tick. You can obtain more information by clicking on the symbol.

    Confidential data

    PostFinance will never ask you to log in via e-mail, and will not ask you for your security details. If you receive an e-mail asking you to log in, reveal personal data, or to open an attachment, it is probably an attempt at fraud.

  • Fraudsters use fake e-mails from companies or financial institutions or messages such as winner’s notifications or declarations of love to try obtain confidential information. Malware is often hidden in such e-mails. Therefore adopt a sceptical approach – especially when it comes to outlandish stories or e-mails written in questionable English. The fraudsters are certainly getting better and better, so you should always be on your guard. It’s better to delete one e-mail too many than let an unsafe one slip through. Never click on links or attachments.


    Fraudsters use phishing to obtain credit card information or login data for e-banking, for example. The fraudsters exploit their victims’ trusting and helpful natures by sending them e-mails with fake sender addresses. They use the data they obtain either for their own fraudulent purposes, or to sell to third parties.

    How to protect yourself

    Never pass on login details and passwords, and delete suspicious e-mails. PostFinance never asks for login details via e-mail.


    Malware is the collective term for programs that cause damage. This includes viruses and Trojans, for example. If your computer is infected, the hacker can see and modify your data, and initiate credit transfers. If you have technical problems or suspect a malware infection, get advice and support from an IT expert.

    How to protect yourself

    You should also exercise care when dealing with suspicious e-mail attachments and always use an up-to-date virus scanner. 

  • If you have any questions or if you have inadvertently shared data by clicking on links, please call our Contact Center.