Overview
- Banamex publicly acknowledged a general system intermitency and asked customers to try later, offering no estimated time to resolution.
- Downdetector recorded hundreds of reports during the morning, with over 500 complaints at one point and a majority tied to sign-in issues reported at 67%–72%.
- Reports were concentrated in major urban areas including Mexico City, Guadalajara, Monterrey and Mérida, with higher counts in Jalisco, Nuevo León and Yucatán.
- Users shared screenshots showing a validateLogin circuit breaker in a HALF_OPEN state and messages about server communication problems.
- The disruption struck during the second December quincena and the week of aguinaldo, prompting sharp social-media complaints from customers unable to complete transfers or urgent payments.