When a voter subscribes to your texts, you can add them right away (single opt-in) or ask them to confirm with a reply first (double opt-in). The choice trades list growth against list quality and defensibility, and it's worth understanding because it shapes both how fast your list grows and how strong your consent is. Here's the difference and when each fits.
What's the difference?
Single opt-in adds a contact to your list the moment they take the subscribing action, texting a keyword, scanning a QR code, submitting a form. Double opt-in adds an extra step: after they subscribe, they get a message asking them to confirm, and they're only fully added once they reply yes. Single is one action; double is subscribe-then-confirm.
What's the trade-off?
Growth versus quality:
- Single opt-in maximizes list growth, no one is lost to a missed confirmation step, so more subscribers make it onto the list. The cost is that some entries may be mistaken, mistyped, or lower-intent.
- Double opt-in produces a cleaner, higher-intent list, everyone confirmed they want to be there, which means better engagement and stronger consent. The cost is that some subscribers drop off at the confirmation step, so the list grows slower.
Which should a campaign use?
It depends on what you're optimizing. For maximum reach with a trusted opt-in method, single opt-in is common and generally sufficient for political texting, especially when the subscribing action itself is a clear, documented consent. Double opt-in makes sense when list quality and airtight consent records matter most, or when you're building a long-term list you'll rely on for years. Either way, capture and log the opt-in clearly, the strength of your program comes from a documentable consent, and both methods can provide that when done right.
Frequently asked questions
What's the difference between single and double opt-in?
Single opt-in adds a subscriber the moment they take the subscribing action. Double opt-in asks them to confirm with a reply first, so they're only added once they say yes.
Is double opt-in required for texting?
Generally not required for political texting when the subscribing action is a clear, documented consent. It's a best practice for list quality and airtight consent, not a universal legal mandate.
Which is better, single or double opt-in?
Single grows the list faster; double produces a cleaner, higher-intent list with stronger consent. Use single for reach with a trusted opt-in method, double when list quality and airtight records matter most.
Keep reading: what is an opt-in? and how to grow a texting list. For the rules, see the FCC.
This is general information, not legal advice, current as of the date above.