Visa Information
Delegates are responsible for ensuring they have the correct permission to enter the UK. Since 2025, the UK has implemented a fully digital border system. Requirements now depend strictly on your nationality and the purpose of your visit. More information can be obtrained from https://www.gov.uk/government/organisations/uk-visas-and-immigration.
| Traveller Category | Requirement | Key Details |
|---|---|---|
| EU, EEA, and Swiss Citizens | Electronic Travel Authorisation (ETA) | Citizens of other EU countries, Switzerland, Norway, Iceland or Liechtenstein can travel to the UK for holidays or short trips with an electronic travel authorisation (ETA) instead of a visa. |
| Non-EU citizens | Standard Visitor Visa | Must be applied for in advance. Costs approximately £127 for up to 6 months. |
Visa Support Letter Requests
ACM is able to provide visa support letters to attendees as well as authors with accepted papers, posters, or members of the conference committee. If you are a recipient of ACM, SIG, or Conference funded travel grant, please include this information in your request.
For visa support letters, please complete the following request online: https://supportletters.acm.org/. Please allow up to 10 business days to receive a letter. All requests are handled in the order they are received. The information below should be included with the request:
- Your name as it appears on your passport
- Your current postal mailing address
- The full name of the MobiSys conference: The 24th ACM International Conference on Mobile Systems, Applications, and Services (MobiSys 2026)
- Conference registration confirmation number, if you have completed registration for the conference, and/or
- If you are the author of any paper, poster, or demo accepted for the conference, please provide the title. If you are a speaker, please provide the title of your talk.
Please note The Association for Computing Machinery does not issue formal invitation letters for visas to attend ACM sponsored conferences.