Contact DoublePenniesOnline LLC
We read everything. And we respond.
DPO is reachable by email for participants, prospective participants, regulators, journalists, and anyone with a question we haven't answered elsewhere on the site. Routing your message by topic helps us respond faster.
All inquiries route through this address. Pick a topic below to pre-fill the subject line for faster routing.
Reach out by topic
Click the card that best matches your reason for contacting us — your email client will open with the subject line already filled in.
General participation question
You're considering participating, or you've already activated and have a general question about how things work.
Email us →Refund request
You'd like to refund your $10 research fee — including after your spending opportunity has been issued. We process refunds within 5–10 business days.
Request a refund →Spending opportunity issue
A transaction declined that you think should have qualified, your card is lost or stolen, or there's another card-related question.
Report an issue →Cancel subscription
You'd like to cancel the optional $20/month subscription that keeps your Spending Account active between orders.
Cancel →Phase 2 information
You'd like to be notified when Phase 2 — DPO's lifetime stewardship support — is announced. We'll add you to the announcement list.
Get on the list →Regulatory inquiry
You're a regulator, compliance professional, or oversight body with a question. Priority routing — see also our Regulators Welcome page (linked in the main nav).
Send inquiry →Media or press inquiry
You're a journalist, researcher, or member of the press writing about DPO. Happy to provide background, on-the-record quotes, or documentation.
Reach out →Feedback or suggestion
You have feedback on the experiment, the website, the spending categories, or any aspect of DPO. We read everything and adapt where it makes sense.
Share feedback →What to expect
DPO is a small research team. We don't have a 24/7 call center, but we read every message and respond to every legitimate inquiry.
Standard response time
Most inquiries — questions, refund requests, subscription changes, general feedback — receive a response within one to two business days.
Time-sensitive matters
Lost or stolen cards, regulatory inquiries with deadlines, and media inquiries with publication timelines receive same-day acknowledgment when received during business hours.
Refund processing
Refunds are processed back through Stripe to the original payment method. The processing window depends on your bank or card issuer.
Languages
DPO responds in English. If you need another language, mention it in your email and we'll do our best — though responses may take longer.
What we can't help with: tax advice, financial planning, investment guidance — DPO is a research company, not a financial advisor. For those, please consult a qualified professional.
Before you contact us
Many of the most common questions are already answered on our Frequently Asked Questions page — organized by topic, easy to scan. If your question is there, you'll get the answer faster than waiting for an email reply.
The FAQ covers: what DPO is, how participation works, the spending opportunity, money & refunds, trust & data, and practical questions about contacting us.
Browse the full FAQ →Ready to join the experiment?
$10 refundable research fee. $500 spending opportunity per order. Up to $5,000 across Phase 1.