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.
There are approximately 1.0566882094326 quarts in one liter. These two measurements are nearly the same. A liter is a metric unit which is equivalent to app. 33.81 oz, where a quart is an SI unit and is equal to exactly 32 oz. A little more info on SI units of volume: 4 Tbsp = 1/4 cup.