If individuals want to automatically refuse foreign mail or block all mail from a specific sender, they must submit a written request to the USPS to withhold correspondence for up to two years.
1 liter = 33.8140226 US fluid ounces. 1 US fluid ounce = 0.0295735297 liters. Note that this is for fluid ounces, not dry ounces. A fluid ounce is a measure of volume, just like a liter is. A dry ounce is a measure of weight.
2 liters of water has a mass of 2 kg and 2 kg = 2 kilograms = 70.5479 ounces. [as you can see by comparing this answer with others, the answer depends on whether you are talking about fluid ounces (a unit of volume), or ounces, a unit of mass. 1 liter 33.8140226 US fluid ounces. So, 67.628 oz.