Bulk cash smuggling can be the result of an illegal narcotics operation, a black market peso exchange trade-based money laundering process, or just the final pieces of some other type of scam. Each year the Mexican cartels smuggle approximately $20 to $30 billion. Estimates indicate that 25% to 50% of that money is processed and laundered through Mexican financial institutions. The DEA, ICE, FinCEN have created a list of red flags that might be indicative of bulk cash smuggling.”]
Source: https://www.bankinfosecurity.com/blogs/how-to-spot-bulk-cash-smuggling-p-604