Signing up for Claude sounds simple: enter your email, verify your phone, start chatting. But plenty of people get stuck partway through.
Whether it’s confusion over the age requirement or a verification code that never arrives, these hiccups are more common than you’d think.
Here’s what the process actually involves and how to work through the most common snags.
What Is Claude’s Age Requirement?
During signup, Claude asks you to confirm that you are at least 18 years old. This isn’t a formality you can skip past. It’s a required checkbox as part of the account creation process.
This age requirement exists because Claude’s terms of service are built around adult users, and the platform isn’t designed or moderated as a service for minors.
If you’re under 18, you generally won’t be able to create your own independent Claude account under the standard signup flow.
Why Age and Identity Verification Exist at All
It might feel like an extra hurdle, but age and phone verification serve a real purpose. They help confirm that each account belongs to an actual, distinct person, rather than a bot or a duplicate signup.
This matters for account security, for preventing abuse of the free tier, and for keeping the platform’s usage policies enforceable.
The Standard Signup Process, Step by Step
- Go to the Claude website or open the app and choose to sign up with your email or a Google account.
- Verify your email address if you signed up that way, by clicking the confirmation link sent to your inbox.
- Enter your phone number when prompted.
- Confirm you are at least 18 years old by checking the required box.
- Enter the verification code sent to your phone via SMS.
- Provide your name and how you’d like to be addressed.
- Acknowledge the terms of service and usage policy before finishing setup.
Common Signup Problems and How to Fix Them
Verification Code Never Arrives
This is one of the most common hiccups. A few things typically help:
- Double-check that you entered your phone number correctly, including the right country code
- Wait a few minutes, since SMS delivery can occasionally lag depending on your carrier
- Request a new code if the first one doesn’t arrive within a reasonable window, rather than repeatedly requesting codes in quick succession
- Make sure your phone isn’t blocking messages from unknown or short-code numbers
Phone Number Already in Use
If you’ve previously created a Claude account with the same number, or if a number was recycled from a previous owner, you may run into an error saying it’s already associated with an account.
If this happens and it’s genuinely your first time signing up, contacting Claude’s support team is usually the fastest path to resolving it.
Confusion Over the Age Checkbox
Some users mistake the age confirmation for a simple terms-of-service checkbox and skip past it too quickly, then get confused when the signup won’t proceed.
Make sure you’re actually checking the box rather than just scrolling past it, since it’s a required field, not an optional one.
Signing Up on Mobile vs. Desktop
The overall flow is nearly identical whether you sign up through the Claude website or the iOS app. The order of steps, email or Google sign-in, phone verification, age confirmation, and terms acknowledgment, stays consistent across platforms.
The main difference is just the visual layout, since mobile screens present the same steps in a slightly more compact format.
What If You’re Signing Up on Behalf of a Business or Team?
The individual account holder still needs to meet the same age and verification requirements, even when the account will primarily be used for business purposes.
Team and business plans add an administrative layer on top of individual accounts, but each individual user still goes through the same personal verification steps.
Frequently Asked Questions
Can someone under 18 use Claude at all?
The standard signup process requires confirming you’re at least 18, so independent account creation isn’t available for users under that age.
Why does Claude need my phone number just to sign up?
Phone verification helps confirm you’re a real, unique individual, which supports account security and helps prevent abuse of free accounts.
What do I do if my verification code keeps failing?
Double-check your number and country code, wait a few minutes between attempts, and reach out to support if the issue continues after a couple of tries.
Can I sign up with just an email and skip phone verification?
Phone verification is typically a required step in the standard signup flow, not an optional one you can bypass.
Does changing my phone number later affect my existing account?
You can generally update your contact information through your account settings after signup, separate from the initial verification step.
The Bottom Line
Claude’s signup process is designed to be quick, but the age and phone verification steps are non-negotiable parts of creating an account.
Most signup issues come down to a mistyped phone number, a missed checkbox, or a delayed SMS code rather than anything more complicated.
Working through the steps carefully, and reaching out to support when something genuinely doesn’t work, gets almost everyone through the process without much trouble.
