International Conference on Large-Scale Infrastructure Systems Engineering - (ICLSISE-26)


5th - 6th December, 2026 | Vienna, Austria

Multi-format (In-person/Virtual)

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Important Dates

Pre-registration Deadline

5th November, 2026

Paper Submission Deadline

10th November, 2026

Last Date Of Registration

20th November, 2026

Date Of Conference

5th - 6th December, 2026

Downloads

Conference Flyer
Sample Abstract
Sample Full Paper
Research Leagues

Conference Invitation Letter

Research Leagues issues an official Invitation Letter to participants who have successfully completed their conference registration. This document serves as formal confirmation of participation and is provided in English for submission to the relevant authorities as part of the application process.

Please be advised that this letter is issued strictly as a supporting document and does not guarantee approval, as all decisions are made independently by embassies or consulates.
How to get your letter

Invitation Letter Request Process

Participants are required to complete the following steps to obtain the Invitation Letter:

Registration Completion

Complete the conference registration and ensure that payment is successfully processed.

01

Submission of Required Details

A Registration Form link will be shared after confirmation. Participants must submit all necessary information accurately.

02

Verification Process

The submitted information will be reviewed for completeness and accuracy.

03

Issuance of Letter

Upon successful verification, the Invitation Letter will be issued and sent to the participant’s registered email address.

04
Essential Details

Important Information

Approval Disclaimer:

The Invitation Letter is provided solely for supporting purposes and does not influence approval decisions.

Processing Timeline:

Processing timelines vary depending on the country and authority. Early application is strongly recommended.

Official Communication Channel:

All Invitation Letters will be issued only through:
[email protected]

Security Notice:

Any communication from unauthorized sources should be reported immediately.