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 33.814022 fluid ounces in a liter for U.S. fluid ounces (fl oz). There are 35.195083 fluid ounces in a liter for Imperial Canadian and U.K. fluid ounce (fl oz). One liter is equal to 1 m-3. U.S fluid ounce is equal to 2.957353 m-5. U.K. fluid ounce is equal to 2.841306 m-5. 1 liter is approximately equal to 33.81 fl oz U.S. 1 liter is approximately equal to 35.19 fl oz U.K.