OTP stands for one-time password — a short, temporary code sent to someone's email that they have to enter back into a form to prove they actually own and have access to that inbox. Unlike a regular password, it's generated fresh for that single verification attempt and expires quickly, so it can't be reused or guessed ahead of time.

The purpose isn't security in the traditional "protect an account from hackers" sense alone — it's verification: confirming that the email address someone is using is real, reachable, and actually theirs.

Spotlightr offers OTP verification in two places: on your email opt-in forms, and as a two-factor authentication (2FA) step for students logging into your courses module.

Gated video or content delivery. If your opt-in form unlocks a video, download, or resource, OTP guarantees the unlock email or follow-up actually reaches a real, monitored inbox — instead of a throwaway address that never gets opened, which makes the gate pointless in the first place.

Webinar and event registration. Verified emails mean accurate headcounts and a reliable way to send reminders and access links — a bot or mistyped signup inflates your numbers without producing a real attendee.

B2B lead generation. For gated whitepapers, demos, or "contact sales" forms, OTP filters out competitors scraping your content and junk submissions, so your sales team spends time on leads who'll actually respond to outreach.

Restricted or exclusive content. For private community invites, early-access betas, or paid-tier content behind an opt-in, OTP ties access to a real identity, reducing shared or fake account creation.

Replacing or supplementing CAPTCHA. If you're using CAPTCHA to stop bots, OTP can serve the same anti-bot purpose while also producing a usable, verified contact — CAPTCHA only proves "not a bot"; OTP proves "real, reachable person."

Free trials or claimable benefits. When the opt-in is tied to starting a trial, claiming a discount code, or unlocking extra credits, OTP makes it much more difficult for people to cycle through fake emails to repeatedly claim something meant to be one-per-person.

Higher quality, verified leads. Every email captured belongs to someone who actually accessed that inbox, so your list isn't padded with typos, fake addresses, or junk entries.

Better deliverability and sender reputation. Fewer fake or dead emails means lower bounce rates, which protects your sending reputation with email providers — a damaged reputation can get even your legitimate emails flagged as spam.

Less wasted spend. Most email tools price by list size or sends. Verified opt-ins mean you're not paying to store or email addresses that were never real.

Reduced bot and spam submissions. OTP naturally filters out automated form-fills and scraping, without making the human experience feel adversarial.

Stronger consent and compliance trail. Verifying the email at signup gives you a clearer record that the address owner actively opted in — useful for GDPR and CAN-SPAM-type requirements.

More reliable analytics. Conversion and engagement metrics become more trustworthy when the leads behind them are confirmed real people rather than noise from junk submissions.

A quick note on when not to use it: OTP adds friction, so it's best reserved for opt-ins tied to real value (trials, demos, exclusive content). For low-stakes newsletter signups, the extra step may not be worth the hit to your conversion rate.

For the courses module, OTP works differently than on opt-in forms. When activated, students log in with their email and password as usual, then must retrieve a one-time code sent to that email before they're let in. This is a classic 2FA setup, and it's particularly useful for course creators for a couple of reasons.

Prevents login and account sharing. This is the biggest one for paid courses specifically. A password alone is easy to share — one student buys access and hands the login to a friend or two. Since the OTP step requires access to the original buyer's actual inbox every time, it's much harder for someone else to get in without the account owner's active involvement. That directly protects revenue that would otherwise leak through shared credentials.

Added security layer against compromised passwords. Passwords get reused, leaked in breaches, or guessed through credential stuffing attacks. Even if a student's password is compromised, an attacker still can't get into the course without also accessing their email, which significantly raises the bar for unauthorized access.

Confirms the right person is engaging with the course. For courses tied to certificates, compliance training, or other credentials, knowing the person logging in is actually the enrolled student matters — both for the integrity of completion data and for the value of the credential itself.

Reduces support tickets related to account security. Suspicious logins and "someone else is using my account" reports are a common support burden for course platforms. 2FA via OTP cuts down on both account compromise and unauthorized sharing, reducing the volume of these tickets.