CADTAG on the alternate post explained it well...an electronic seal is just that, electronic. The 'signature/seal' can be created in Acrobat. When you create your .pdf document you can then 'sign and seal' in order to submit for permit. This is still in its infancy as far as I know but several municipalities in South Florida are trying our last nerve with this process. Florida law allows electronic signatures in lieu of 'wet' and 'crimping'. Have faith, we are finally heading into the paperless era...finally!