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ChainChum
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Customer support

We are a small team and we read every message. Write to chainchum@dataexpansed.com and we answer within one business day (Monday to Friday, US Eastern time). Include your order number (it looks like CC-7K2M9Q) if your question is about an order.

You can also reply to any email we send you about an order.

Your orders

  • Where is my order? Open Me › Purchases and choose the order. Once the seller ships, you see the carrier and tracking number there and we email them to you. Sellers ship within the handling time shown on the listing.
  • It arrived. Press It arrived on the order page. That lets the seller know and starts your return window.
  • A digital download. It is ready as soon as you pay: open the order and press Download. Each link works for 24 hours and 5 downloads, and Make a new link gives you a fresh one at any time. See Buying on ChainChum.
  • Receipts and tax. Your receipt is emailed when you pay and stays on the order page. Sales tax is shown at checkout.

Refunds and returns

The full policy, including cancellations and what a refund does to the certificate, is on Returns, refunds and cancellations. In short:

  • Originals, editions and handmade goods: you can return a piece within 14 days of delivery. Write to us first with your order number; we arrange the return with the seller. You pay return shipping unless the piece is damaged or not as described. We refund the item price and its tax once the seller confirms the piece is back, normally within 5 business days.
  • Damaged, lost or not as described: write to us within 14 days of delivery (or of the expected delivery date if it never arrived) with photos. We refund in full, including shipping, when the problem is confirmed.
  • Digital downloads are final once paid, unless the file is broken, missing or not what the listing described. Then we fix it with the seller or refund you in full.
  • Refunds go back to the card or wallet you paid with. Your bank may take 5 to 10 business days to show it.
  • When an order is refunded, the certificate goes back to the artist (or is cancelled if it was issued at the sale) and downloads stop working.

If you and the seller cannot agree, ChainChum decides using the order, the photos, the tracking and the certificate.

Selling

Your account and data

Download your data or close your account from Me, and read how we handle it in the Privacy Policy. Signing in and security: Account and privacy.

Report a problem

To report a listing that looks AI-generated, copies someone else's work, shows a child's face or name, or an account you think belongs to someone under 18, write to chainchum@dataexpansed.com with the link. We review every report. Copyright notices: see section 9 of the Terms of Service.

Company

ChainChum is run by DataExpansed LLC, 6 Landmark Square, 4th Floor, Stamford, CT 06901, United States.