diff --git a/README.md b/README.md
index 5663b17..146d447 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,7 @@ As of version 0.1.4 the module implements the fallowing API calls:
 * `setItemQuantity(customerCode, itemCode, amount, callback)`
 * `addCustomCharge(customerCode, chargeCode, quantity, amount, description, callback)`
 * `deleteCustomCharge(customerCode, chargeId, callback)`
+* `oneTimeInvoice(customerCode, {data}, callback)`
 
 All callbacks are called with `error` and `results` parameters.
 
diff --git a/lib/cheddargetter.js b/lib/cheddargetter.js
index 1ca2be1..366cee8 100644
--- a/lib/cheddargetter.js
+++ b/lib/cheddargetter.js
@@ -156,3 +156,8 @@ cheddargetter.prototype.deleteCustomCharge = function (customerCode, chargeId, c
 	chargeId = {chargeId: chargeId};
 	this.callAPI(amount, "/customers/delete-charge/productCode/" + this.productCode + "/code/" + customerCode, callback);
 };
+
+cheddargetter.prototype.oneTimeInvoice = function (customerCode, data, callback) {
+	this.callAPI(data, "/invoices/new/productCode/" + this.productCode + "/code/" + customerCode, callback);
+};
+