FAQs
General
What is the difference between LetterSG and Postman?
Helps public officers to issue and send personalised & verifiable digital official communications to citizens quickly
Mass broadcasting communication tool for public officers to reach citizens. Offers both email and SMS (via gov.sg) channels
What is the difference between LetterSG and FileSG/ TrustDocs/ OpenAttestation?
Helps public officers to issue and send personalised & verifiable digital official communications to citizens quickly
Offers tamper-proof certifications on the blockchain that meet international standards for verification
How can we check if the recipient has read the letter?
You will be able to check the read status of the letter via your LetterSG dashboard. After logging in, click on Dashboard → Select the relevant batch → Find the relevant recipient letter → Read
status column.
Is there a maximum limit for the number of letters that can be sent via LetterSG?
Currently, we support a maximum batch size of 500 letters. If you have more recipients, consider splitting your recipients into multiple batches of 500 for issuance.
How long will the letters be accessible for?
Letters issued will be accessible at all times and will not expire.
Security
What is the security and sensitivity classification of LetterSG?
We can handle up to restricted sensitive-normal data.
Is it safe to send out LetterSG links to citizens?
Where is the data on LetterSG stored?
It is stored on servers in Singapore, complying with IM8 policy.
Can we attach our signature at the end of the letter?
Getting started
I've issued a test letter and opened the letter link to check the contents. When viewing the dashboard, why doesn't the letter's read status change to "Read"?
Sending letters via email and SMS
Can we change the title name and content in the letter email and SMS notifications?
Outgoing emails sent via LetterSG will have the email title ”Letter from {{template_name}}” . We are able to change the template name for you, but we are unable to customise the body of the email any further as it is intentionally standardised for all outgoing emails from LetterSG to improve legitimacy and readership of letters.
Can we customise the logo and agency information in the letter email and SMS notifications?
The logo and agency name cannot be customised as it is automatically determined based off your user email domain.
Can we change the reply-to email address in the letter email notification?
The reply-to email address will correspond to the email address of the user who sent the letters. Users can consider using a shared team email address to issue the letters.
Can we resend a letter to the same recipient?
We do not support resending of the same letter to recipients to prevent spamming. If you wish to use the same letter, you can consider sharing the original letter link with the recipient, or using Postman to send another SMS or email containing this letter link, to the same recipient.
Alternatively, you may issue a new letter to the recipient which will generate a new letter link.
Can we use our agency sender ID to send SMSes?
What is the cost involved with using the SMS function?
We will be migrating over to GovSG sender ID by end of Q2 2024. Prior to migration, we are happy to absorb the costs for sending SMS to users. After switching over, the cost attribution will be dependent on the cost attribution policy that GovSG adopts, and we will provide more information on this at a later date.
Can we add attachments / images / files / PDFs to letters?
Others
I am unable to receive an OTP/ unable to log into LetterSG. What should I do?
I am interested in using LetterSG but I am unable to register or log in. What should I do?
I cannot find an answer to my question on this guide. What should I do?
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