Sign, distribut, and store your digital invoices, with a 'Cloud' system 'Cloud'

PortaSigma might be tool you need to issue digital invoices
Pay as much as you use it. We have a plan for you, which only depends on the invoices you issue each month.
You will just haev to send your PDF invoice to PortaSigma, and enter the e-mail and name of your customer. The document will be automatically signed and sent.
All invoices will keep stored, and easily searchable.