Guide for sign-up forms

Sign-up form abandonment: where sign-ups get lost.

People who start a sign-up form want to sign up, and many still give up halfway. This guide shows where sign-up forms lose people, which fields you can usually drop and what is left when the contact comes from a sent message instead of a form.

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Where forms lose people
Which fields can go
A sign-up without a form

Christian Schätzlein, Founder and developer of Sendity 3 min read

signup-form

Which fields can go?

Tap the fields you would drop, then reveal.

What is Sendity?

Sign-ups by message. No form, no code.

Sendity is a sign-up widget for your website. Instead of filling in a form, your visitors send one short message via WhatsApp or email. Sendity checks who it came from and hands your site the name and the confirmed phone number or email address.

See how Sendity works →

One message instead of a form Visitors tap send in WhatsApp or their email app. Nothing to type, no confirmation email to click.
Confirmed by the message itself The contact comes from the sender of the message, so typos and made-up addresses never reach your list.
Pay per confirmed contact Start with 1,000 free credits, no credit card. After that, prepaid packages with no subscription.

Abandonment rarely has one cause. It adds up field by field, and the confirmation email comes on top.

Every field asks for effort

Each field is a small decision: what do they want this for, do I have to? On a phone, every field also means switching keyboards and correcting typos.

Errors and rules

Error messages after sending, phone numbers in the wrong format, passwords with rules: each one is a moment to give up.

The confirmation email

After the form, the last step happens outside your page: open the inbox, find the email, click. Spam folders and delays lose people who had already said yes.

Ask later

Ask only for what the next step needs. Job title, company size or interests can wait until the second or third contact, when people trust you more.

Without a form

With reverse OTP, the visitor sends one prepared message. The contact and usually a name come from that message, and the confirmation is already part of it.

How it works

Shorten your form in three steps.

Before redesigning anything, look at what you actually use.

Justify each field
Who uses it, and for what? Fields without an answer go.
Measure where people stop
Form analytics show the field after which most people leave.
Replace the contact fields
Let the contact come from a sent message instead of typed fields.

Compared

Form or one message?

What a visitor has to do before the sign-up counts.

Aspect	Sign-up form	With Sendity
Fields	Several, some required	None
On a phone	Small keyboard, autocorrect	One tap on send
Confirmation	A separate email with a link	Part of the sent message
Typos	In every field	None in the contact

Benefits

What leaving out the form changes.

Fewer places to give up, and a contact you can rely on.

One step

Sign-up and confirmation in the same message.

Made for phones

No typing on a small keyboard.

Verified contacts

Every contact has already written to you.

Integration

Live on your page in minutes.

Sendity runs as a compact widget on your page. Pick the path that fits your website.

WordPress plugin Add Sendity to any page as a block. No code needed. Read the guide Laravel package Check the signed result on your server in a few lines. Read the guide Any other website Paste one snippet into your page and match the widget to your brand. Read the guide

FAQ

Form abandonment: common questions.

How many fields are too many?

There is no fixed number. Every field you do not use is one too many, and under the GDPR you should not ask for it anyway.

How do I measure abandonment?

Compare how many people start the form with how many finish it, and use form analytics to see the field where they stop.

What if I need more data?

Ask in a second step, after the sign-up, when the visitor already has something from you.

Where does the name come from without a form?

From the WhatsApp profile or the sender name of the email, and with business emails often from the signature.

Guide Confirmation email not arriving? Where double opt-in loses subscribers Spam folders, typos and automatic clicks, and how subscribers confirm by sending one email. Guide Sign-up without a password: what works, what fits Social login, magic links, passkeys and reverse OTP compared, and an account with one message. Product Double opt-in without the confirmation email Signed emails instead of links. Try it Live demo Ten seconds on your phone.

Reviewed for accuracy in November 2026 by Christian Schätzlein.

Sign-ups without a form.

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