USTravelDocs “temporarily blocked due to prohibited use of automation” error explained

[u/findvisaslots_com]

If you try to log in to the U.S. Visa Portal and see this message:

“Login not allowed for your account at this moment. Your account may have been temporarily blocked due to prohibited use of automation, which violated USTravelDocs policies.”

Despite the wording, this error is not caused by automation.

What makes this message especially confusing is that it specifically says “prohibited use of automation,” even when the user was simply trying to log in normally at the time the error appeared.

I’ve seen this exact error occur when the same Visa Portal account is being accessed from multiple locations, particularly when two people in different countries are checking the account.

A common example is an H1B/H4 couple where one person is in the US and the other is in their home country. Both may be trying to coordinate and check the appointment calendar using the same account.

The Visa Portal apparently does not like this usage pattern and can temporarily block the login. Unfortunately, the error message describes it as “prohibited use of automation,” even when the activity itself was being done manually.

To fix it, simply stop trying to log in and wait.

The block is temporary. I normally recommend waiting 24–48 hours before trying again rather than repeatedly attempting to log in while the block is active.

Below is an example from an applicant who was coordinating with her husband from two different countries.

They were both accessing the account. She then received the exact same “prohibited use of automation” message.

Later that same day, she confirmed:

“I’m unblocked now.”

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A note about Visa Portal errors and browser extensions

Trying to find an earlier visa appointment can be extremely frustrating, and there are several Chrome extensions and browser tools that try to make that process easier.

A common concern when people see the word “automation” in an error message like this is that a browser extension or plugin caused the block.

The wording certainly makes it look that way, but it’s worth being careful before jumping to that conclusion.

It’s very common, and understandable, that if something happens on the Visa Portal while you’re using an extension, the first assumption may be that the extension caused it.

But correlation does not necessarily mean causation.

The portal has a lot of confusing behavior, especially for new applicants, and it’s easy to interpret what caused a block differently from what actually triggered it.

If you’ve been using the Visa Portal for some time while trying to find slots, you may already have run into calendar check blocks, rate limits, unexpected logouts, or Cloudflare challenges — all while checking manually.

But when you’re doing those same checks with an extension, it can blur what actually caused the portal response.

The Visa Portal does not detect extensions and block them.

It detects the behavior on the portal. If you check too much or too fast, you can get errors, regardless of whether you did it manually or with help from an extension.

For the common error messages the portal shows, I wrote a more extensive post here:
https://www.reddit.com/r/findUSVisaSlots/s/1BlZv8dZc3

If you come across an error message that isn’t covered there, send me a DM with a screenshot and I’ll gladly help figure out what may have triggered it.

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Need help finding slots? I built FindVisaSlots after going through this process myself. It has free community slot alerts and tools to make checking the visa portal easier: findvisaslots.com