I have had many companies ask me about electronic signature (sometimes referred to as eSignature) verification features when it comes to completing and singing forms on smartphones, tablets and PCs.
Companies such as DocuSign provide an electronic signature certification feature. However there is a flaw in that certification service.
All it means is that they certify the signature on a particular form signed by a user is the same as the initial signature they entered or uploaded when they set up their account.