According to some embodiments, an apparatus for securing railcar doors comprises a staple affixed to a portion of a railcar. The staple defines a staple hole. The apparatus further comprises a hasp. The hasp comprises a hinge. The hasp further comprises a first portion pivotally coupled to the hinge. The first portion is affixed to the railcar. The hasp further comprises a second portion. The second portion comprises a first end and a second end. The first end of the second portion is pivotally coupled to the hinge. The second end is opposite the first end. The second portion of the hasp comprises a square key plug configured to be inserted into a square key hole of a railcar door. The second portion of the hasp defines a first hole through which a portion of the staple may pass when the hasp is in a closed position.