Possible, but that set of facts do not appear to be alleged anywhere. If this was thought to be true, it would have definitely been alleged in the prosecution agreement.
The Guardian published something [0]:
>In some branches the boxes of cash being deposited were so big the tellers' windows had to be enlarged.
Rolling Stone published something different [1]:
> ... Breuer admitted that drug dealers would sometimes come to HSBC's Mexican branches and "deposit hundreds of thousands of dollars in cash, in a single day, into a single account, using boxes designed to fit the precise dimensions of the teller windows."
The Guardian published something [0]: >In some branches the boxes of cash being deposited were so big the tellers' windows had to be enlarged.
Rolling Stone published something different [1]: > ... Breuer admitted that drug dealers would sometimes come to HSBC's Mexican branches and "deposit hundreds of thousands of dollars in cash, in a single day, into a single account, using boxes designed to fit the precise dimensions of the teller windows."
The one doesn't exclude the other.
What is the problem?
[0] https://www.theguardian.com/business/2012/dec/14/hsbc-money-...
[1] http://www.rollingstone.com/politics/news/outrageous-hsbc-se...