Contact Information Appending for Nonprofits

You have a database of donors who support your mission, but can you reach them through multiple channels? Do you have their email address but not their phone number? Their mailing address but not their email? When you can only reach donors through one channel, you’re limiting your fundraising potential.

It’s missed opportunities when your year-end appeal goes only by mail but some donors prefer email. It’s lower response rates when you can’t follow up by phone after sending a letter. It’s reduced engagement when you can’t communicate through the channel each donor prefers. Every missing contact method is a barrier to building stronger donor relationships.

How much more could you raise if you could reach every donor through their preferred communication channel? Think about the scenarios. You want to send an urgent appeal for a matching gift opportunity. Email would be perfect—instant, cost-effective, and timely. But you only have mailing addresses for half your donors. By the time your letter arrives, the matching period has ended.

Or consider donor stewardship. You want to call your major donors to thank them personally. But you only have email addresses. You want to send a beautiful printed annual report to your legacy society members. But you only have phone numbers. What does single-channel communication do to your ability to build meaningful donor relationships?

And here’s the compounding problem: when you can’t reach donors through multiple channels, you can’t implement sophisticated fundraising strategies. You can’t do multi-touch campaigns that combine mail, email, and phone. You can’t test which channel works best for different donor segments. You can’t rescue lapsed donors by trying a different communication method. How many donors are you losing simply because you can’t reach them through the channel they actually check?

Contact Information Appending Built for Nonprofits

Our contact information appending services are designed specifically for nonprofits who need multi-channel donor engagement to maximize fundraising results. We append missing email addresses, phone numbers, and mailing addresses to your donor database so you can communicate through every channel and build stronger relationships.

What We Deliver

Email Address Appending: We add verified email addresses to donor records that only have postal addresses or phone numbers. Your urgent appeals reach inboxes instantly instead of waiting weeks for mail delivery.

Phone Number Appending: We append phone numbers (landline and mobile) to records that only have email or postal addresses. Your stewardship team can make thank-you calls and your phone-a-thon volunteers have numbers to dial.

Postal Address Appending: We add current mailing addresses to records that only have email or phone contact. Your printed appeals, annual reports, and event invitations reach donors’ homes.

Nonprofit-Friendly Pricing: We understand nonprofit budgets. Our pricing is designed to deliver maximum value for mission-driven organizations working to make every fundraising dollar count.

The Power of Multi-Channel Donor Engagement

Imagine the feeling of confidence when you can reach every donor through their preferred communication channel. No more wondering if your appeal will reach them. No more limiting your strategy because you only have one contact method. Just the flexibility to engage donors however they want to be reached.

Your fundraising results transform. Response rates climb because donors receive appeals through channels they actually check. Donor retention improves because you can steward relationships through multiple touchpoints. Giving increases because you can implement multi-touch campaigns that combine the impact of mail with the urgency of email and the personal connection of phone calls. What would a twenty percent increase in fundraising revenue mean for your programs and the people you serve?

Your donor engagement becomes strategic. You can test which channel works best for different donor segments. You can rescue lapsed donors by reaching out through a different method. You can implement sophisticated campaigns that touch donors multiple times through multiple channels. You maximize every fundraising opportunity because you’re not limited by missing contact information.

And as the nonprofit development professional, you’re building donor relationships the way they should be built—through consistent, multi-channel communication that meets donors where they are. You’re not apologizing for missing contact information. You’re executing fundraising strategies that drive mission impact.

And here’s something else: when you work with List57, you’re not just getting contact information appending. You’re getting access to our exclusive free merch program. High-quality, stylish, sporty merchandise that you’ll actually want to wear—absolutely free with your order. It’s the kind of unexpected value that makes working with us feel different.