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You can invoice your purchases (CFDI). You only need your Constancia de Situación Fiscal (CSF) (Tax Status Certificate) from the SAT once; afterward you can let your purchases be invoiced automatically.

Step by step

  1. Go to My orders and choose the order you want to invoice.
  2. Upload your CSF (a PDF you download from the SAT) the first time — we validate your tax details.
  3. You receive your invoice (CFDI) for the order; it becomes available for download.

Receipt → invoice

Every purchase generates its proof of purchase. If you didn’t invoice at checkout, you can convert that order to an invoice later (within the allowed period) from My orders.

Auto-invoicing (once and for all)

When you invoice for the first time with your CSF, you can enable auto-invoicing: your subsequent purchases are invoiced automatically with your details, without you having to request it each time.

Orders with multiple sellers

EUM is a marketplace: an order may include products from EUM and from other sellers. In that case, each party invoices their own line items — you may receive more than one CFDI for the same order. This is normal and fiscally correct.

Your invoice doesn’t arrive or a detail is wrong?

Open a support ticket with the order number and your RFC. Verified against the production system (2026-08-01). Informational; does not constitute tax advice.