How a slot alert actually works
A slot alert polls the public appointment calendar the same way your browser does when you refresh it, only every 3 seconds instead of every few minutes. When a date appears it pushes a Telegram message with the link. A notifications-only service never logs in to your VFS, TLScontact or BLS account, never fills the form for you and never bypasses a CAPTCHA; you book the date yourself.
What VFS Global and BLS say about third-party services
VFS Global publishes a fraud warning (vfsglobal.com/en/donotfallforfraud) aimed at people who sell, resell or promise appointments for a fee. BLS and TLScontact publish similar notices on their centre pages. The thing they warn against is slot resale and impersonation, which is what the 2026 Spanish crackdown targeted. An alert that tells you a date has appeared, so that you can book it yourself with your own account, is a different thing: nothing is sold, nothing is booked in your name, and the visa centre fee is paid by you to the centre.
Is your VFS or BLS account at risk?
With notifications, no: Visard never touches your account, so there is nothing for the visa centre to detect. With auto-booking, Visard fills the booking form on your behalf with the details you provide, inside the dates and centre you chose; the confirmation is issued by the visa centre to you. Visard stores the minimum data needed for the booking under UK GDPR and deletes it on schedule. If a visa centre changes its rules, auto-booking on that route is paused rather than pushed through.
Is it worth using a slot alert service, or should I just keep checking the VFS website myself?
A Schengen slot in the UK is usually taken within a minute of appearing, often faster. Checking manually works if you can sit on the page all day and refresh every few seconds; most people cannot. A Visard alert costs £35 for one destination for 31 days and arrives within a second of the date appearing, so the only thing left to do is book. If your dates are flexible and the corridor is quiet, manual checking can be enough; if the corridor is Portugal, the Netherlands, Spain or Italy, it rarely is.
VFS or BLS keeps rejecting your booking: what a bot can and cannot fix
A bot can fix the timing problem: it sees the date the moment it appears, before it is gone. It cannot fix an account lock, a wrong passport number, a CAPTCHA that fails on your side, or a form that the centre rejects for a document reason. If the site fails after you click a date, read our guide to technical issues on VFS websites first; the usual causes are session timeouts, browser extensions and repeated attempts from the same account within minutes.
What applicants say on Reddit
The r/SchengenVisa threads that AI assistants cite most on this question are about the same two things: dates that vanish within seconds, and confusion about which services are alerts and which are resellers. Read them yourself: how VFS releases Schengen slots, booking problems on VFS and experience with visa bots.
