Yes, an invitation letter should be signed by the host to confirm authenticity and responsibility for the invitation.
Why a signature is required
A signature from the host is an important part of an invitation letter. It shows that the host has formally agreed to invite the visitor and stands behind the information provided.
Acceptable formats
The signature can be handwritten or a scanned signature on a typed document. What matters is that the letter clearly indicates it has been approved by the host.
Impact on application
In many cases, unsigned letters may be considered incomplete or less reliable, especially if there are no other strong supporting documents.
Including a signature, along with the host’s identification and contact details, helps make the invitation verifiable and consistent with standard visa documentation practices.