backcharge(A billing made to collect an expense incurred in a previous billing period. A back charge may be an adjustment due to an error, or it may be to collect an expense that was not billable until a later period due to timing issues. Источник: answers.comYuriy Melnikov)
backcharge(charge somebody for previous transaction: to charge a person or a firm an amount of money in order to make adjustments for a previous transaction. Источник: msn.comYuriy Melnikov)