Domestic
PAYMENTS SIGNAL · REFERENCE CARDMexico SPEI — Banco de Mexico's interbank system
Riya sends pesos to Arjun by CLABE; SPEI, Banco de Mexico's real-time gross settlement system, settles the payment individually in central-bank money within seconds.
Actors
- Riya (customer)customer
- Bank Alfa (sending bank)bank
- SPEI (Banco de Mexico)infrastructure
- Nordbank (receiving bank)bank
- Arjun (customer)customer
Messages
No standard message — a book / internal transfer.
The sequence
| # | Step | Route | Kind |
|---|---|---|---|
| 1 | Instruction — Riya instructs Bank Alfa with Arjun's CLABE | Riya → Bank Alfa | message |
| 2 | Validate & debit — Bank Alfa validates and debits Riya | Bank Alfa | posting |
| 3 | Payment order — Bank Alfa submits the order to SPEI | Bank Alfa → SPEI | message |
| 4 | Gross settlement — SPEI settles the payment individually, in seconds | Bank Alfa → Nordbank | settlement |
| 5 | Credit & CEP — Nordbank credits Arjun and a CEP is issued | Nordbank | posting |
Exception rails
| Rail | Trigger | Where the money ends up | Next action |
|---|---|---|---|
| Not enough balance — the payment is queued | At the moment Bank Alfa's order reaches SPEI, Bank Alfa's balance does not cover MXN 2,000.00. | Debited from Riya; Arjun is paid once the queued order settles. · Settlement waited on liquidity — SPEI queued the order instead of overdrawing Bank Alfa or rejecting it. | Bank Alfa — Bank Alfa manages its intraday balance so orders settle promptly rather than sitting in the queue. |