diff --git a/index.js b/index.js
index 1ba8e98..6a4a088 100644
--- a/index.js
+++ b/index.js
@@ -160,6 +160,40 @@ class Pass {
 		return Buffer.from(strings.join("\n"), "utf8");
 	}
 
+	/**
+	 * Sets expirationDate property to the W3C date
+	 *
+	 * @method expiration
+	 * @params {String} date - the date in string
+	 * @returns {this}
+	 */
+
+	expiration(date) {
+		if (typeof date !== "string") {
+			return this;
+		}
+
+		const convDate = dateToW3CString(date);
+
+		if (convDate) {
+			this.props.expirationDate = convDate;
+		}
+
+		return this;
+	}
+
+	/**
+	 * Sets voided property to true
+	 *
+	 * @method void
+	 * @return {this}
+	 */
+
+	void() {
+		this.props.voided = true;
+		return this;
+	}
+
 	/**
 	 * Checks if pass model type is one of the supported ones
 	 *
@@ -406,6 +440,27 @@ class Pass {
 	}
 }
 
+/**
+ * Converts a date to W3C Standard format
+ *
+ * @function dateToW3Cstring
+ * @params {String}
+ */
+
+function dateToW3CString(date) {
+	if (typeof date !== "string") {
+		return "";
+	}
+
+	let parsedDate = moment(date, ["MM-DD-YYYY"]).format();
+
+	if (parsedDate === "Invalid date") {
+		return "";
+	}
+
+	return parsedDate;
+}
+
 /**
  *	Apply a filter to arg0 to remove hidden files names (starting with dot)
  *	@function removeHidden