Nubank and Mercado Pago, two of Latin America's largest retail crypto gateways, froze key cryptocurrency transfer paths on Friday, November 6, 2026, after external screening and data providers failed. Deposits and wallet movements stalled while in-app buying and selling continued — a split that highlights how much the region's consumer crypto services still depend on third-party transfer screening rails even when the trading screen looks fine.

Brazilian digital bank Nubank told users that crypto withdrawals and deposits were temporarily unavailable because of "instability in an external data provider." In a statement carried by Exame and Veja, the bank said the problem was not on Nubank's own systems. Customer assets and data remained protected, it said, and other crypto products were still working. Transfers would resume only once the supplier's service came back.

Mercado Pago, the payments arm of MercadoLibre, described a different slice of the same problem. Its notice said crypto transfer operations had become unstable following an incident at a risk-monitoring and anti-money-laundering provider. Some transfers to external wallets were blocked as a protective step. Incoming deposits could also be delayed, then credited automatically once the service recovered. Buying and selling of virtual assets continued without impact, the fintech said. A Reuters wire carried by Channel NewsAsia confirmed both freezes. Neither firm named the affected vendor.

What Froze and What Did Not

The disruption hit the rails that move coins on and off the apps, not the rails that price and match trades inside them.

Nubank suspended direct crypto deposits and withdrawals through its app, while trading of cryptoassets stayed available. Mercado Pago blocked part of its outbound transfers to external wallets and warned that inbound deposits might lag. Spot buying and selling remained up.

That pattern is the puzzle. Users can still swap fiat for crypto inside the app, yet cannot freely push the same coins to a self-custody wallet or another venue until the screening infrastructure responds again.

Neither company identified the external provider, and the public notices leave open whether both firms hit the same vendor or two parallel failures on the same Friday. Custody labels in public materials sit beside the story rather than inside the outage claim. Veja notes Fireblocks as Nubank's stated crypto custodian and Paxos as Mercado Pago's. Those names describe where assets sit, not which screening hop failed.

Why Crypto Transfer Screening Rails Sit on the Critical Path

Retail crypto inside a bank or payments app is not a single pipe. One path prices and settles a buy or sell against the firm's own inventory or liquidity partners. A second path decides whether an external address or inbound deposit is safe enough to credit or release. That second path leans on outside data: address risk scores, sanctions and anti-money-laundering monitors, and transaction verification feeds. Outsourcing those feeds is standard practice among regulated fintechs that offer retail crypto, so screening downtime can idle transfers at consumer platforms even when their trading engines stay up — the exact split both firms showed. When those feeds wobble, a regulated retail front typically halts the movement, not the quote.

That is why these rails matter more than the trading button on a day like this. The problem is structural. On-app crypto can look live while the compliance and data layer that gates self-custody exits is dark. Funds can be "secure" in the company's sense and still be stuck for a user who needs them elsewhere. The relevance to automated finance is not a model demo — it is the dependency stack. Automated risk monitors and data vendors sit between a retail balance and the open network. When they fail, Latin America's largest consumer gateways choose freeze over free flow.

Both firms said they were working with their suppliers to restore transfers, and Nubank tied resumption directly to the supplier's service returning. With neither company naming the provider, the visible signal to watch is each firm's next notice that deposits and withdrawals are live again. Until those vendors are back online, the mental model is simple. In these apps, buying and selling prove the product still prices crypto. Deposits and external-wallet transfers prove whether the third-party screening layer is actually online.