Tactile security feature for document and signature authentication

A method of creating an authentication mark on a recording medium, comprising:

• (a) depositing marking material on a medium in an image area to create a marking material image and in an authentication image area to create a marking material authentication image;
• (b) depositing a predetermined amount of additional marking material upon the deposited marking material located in the authentication image area to increase an amount of marking material associated with the marking material authentication image in the authentication image area;
• (c) transferring the deposited marking material and the deposited predetermined amount of additional marking material from the medium to a recording medium;
• and
• (d) fixing the transferred marking material upon the recording medium such that the fixed marking material associated with the authentication image area is a tactilely perceptible authentication mark, the fixed marking material associated with the tactilely perceptible authentication mark having a first height, the first height being tactilely perceptible.