Actually, illegal immigrants using the USPS to mail moneys from the illegal gains in illegal jobs could be considered a federal crime considering the money was earned through illegal means. This would be using the USPS to launder money which is very illegal.
"Actually, illegal immigrants using the USPS to mail moneys from the illegal gains in illegal jobs could be considered a federal crime considering the money was earned through illegal means. This would be using the USPS to launder money which is very illegal."
IMHO, the USPS itself is in violation of the RICO Act.