Phone append is the practice of buying phone numbers from a data vendor and attaching them to your voter file, so records that had a name and address now have a phone number too. It's a common way campaigns get numbers at scale, and it creates a dangerous temptation: the numbers are right there, so why not text them? The answer is that phone append gives you numbers, not consent, and texting appended numbers cold is exactly the mistake that lands campaigns in trouble.
What is phone append?
Phone append is a data service that matches your voter or contact records to phone numbers from commercial databases, filling in the phone field for records that lacked one. A vendor takes your list of names and addresses and returns it with appended mobile numbers. It's useful for targeting and for phone programs, and it's how campaigns turn a voter file into something with numbers attached. But appending a number is a data operation, not a consent operation.
Why isn't appended data consent?
Because a number you bought and matched is not permission to text it. The voter didn't opt in to your texts; a vendor sold you their number. This is the same trap as texting a raw voter file match, appended numbers are data, and consent is separate. Texting appended numbers cold is unconsented contact, the exact fact pattern the rules target, and it draws complaints, filtering, and legal risk. The convenience of having the numbers is precisely what makes phone append dangerous: it looks like a textable list and isn't.
What can you use appended numbers for?
Targeting and permitted channels, not cold texting. Appended data helps you understand and target your universe, and it can support phone programs under their own rules. But to text an appended number, you need consent for that number specifically, obtained the same way you'd grow any consented list. The right workflow is to use appended data to know who's in your universe and then earn text consent from them, never to treat the appended file as a list you can blast. A number in your database, however you got it, is not a subscriber until they opt in.
Frequently asked questions
What is phone append?
Buying phone numbers from a data vendor and matching them to your voter or contact records, filling in the phone field for records that lacked one. It's a common way to get numbers at scale for targeting and phone programs.
Is phone append the same as consent?
No. Appended numbers are data you bought, not permission to text. The voter didn't opt in; a vendor sold you their number. Texting appended numbers cold is unconsented contact and a compliance risk.
Can you text phone-appended numbers?
Not without consent for that number specifically. Use appended data for targeting and permitted channels, but to text an appended number you have to earn text consent from that voter the same way you'd grow any consented list.
Keep reading: what is a voter file? and do campaigns need consent to text voters?. For the rules, see the FCC.
This is general information, not legal advice, current as of the date above.