In essence a signature is all about intent. An X can be your signature or any type of mark. What matters is that you are marking your intention to enter an agre

In essence a signature is all about intent. An X can be your signature or any type of mark. What matters is that you are marking your intention to enter an agreement. You can ask your friend to sign your name for you. That is 100% your legally binding signature even though they drew it because of your intent. Obama signed bills into law remotely using an auto pen while he was in Europe. That is 100% his signature because of intent. The DOJ wrote a compressive piece on this that goes into signatures in general much deeper: https://www.justice.gov/olc/opinion/whether-president-may-sign-bill-directing-his-signature-be-affixed-it https://www.justice.gov/olc/opinion/whether-president-may-si...