LetterSigner is an electronic signing solution that allows users to sign PDF documents digitally. It streamlines the signing process by eliminating the need to print, route, and resubmit documents for signatures. Users can sign documents on a tablet or using their Belgian ID card. The application verifies signers' identities and ensures document integrity by invalidating any signatures if the document is modified after signing. It supports multiple signature capture methods and PKI security tokens for digital signatures.

1. LetterSigner
Electronic Signing of documents
The signing of contracts is still a complex process at the end of a long negotiation period. But without a signature most
documents are useless.
Then comes the bottleneck: your process slows down and you can't close the sales cycle quickly because you suddenly have to switch back
to a paper process in order to get an agreement or final contract signed. The specific document is a pdf document and can be a business
document, a contract, an administrative document, a delivery note …
Managing the contract execution process and getting signatures on the official paper document is a transaction that could take days
because of having to route it to different parts of a company or even to different regions or countries.
It's possible to sign manually on a tablet PC with an electronic pen or with your personal identity card (Belgium eID) making use of different
reading devices. The signing offers you secured electronic pdf documents. This procedure helps you saving time and paper. The document
doesn’t need to be printed several times.
The application provides evidence of the signer’s authenticity with proof of the signer’s identity, document integrity and originality.
Any user that modifies and saves the document after it has been signed, will invalidate the signature(s).
The integrated solution has a positive impact on the environment because printing, faxing or mailing becomes optional?
LetterGen nv - Koloniënstraat 11 - 1000 Brussels / Groene Hofstraat 31 - 2850 Boom - Belgium
RPR Antwerpen - BTW BE 0467.046.486
www.lettergen.com - info@lettergen.com Tel +32 3 450 89 80 - Fax +32 3 450 89 89

2. LetterGen
Sample workflow of LetterSigner
(1) (2) (3) (4)
H H I H I I I I
D D D D D D D D
Document to sign
H = Handwritten field H = Handwritten field
D = Digital signature field D = Digital signature field
D = Digital signature field D = Digital signature field
- Check if all manual fields are filled in
All signatures
- Disable all manual fields
in one session
(6) (5)
I I
D D
Signed document All signatures present
Check if all fields are filled in
(1) Create a PDF document with handwritten fields and digital signature fields.
(2) Visualization of the document in LetterSigner. Digital signature fields and handwritten fields are highlighted.
(3) Text or a signature can be drawn in the handwritten fields. It is impossible to draw outside the predefined region.
(4) When clicking on a digital signature field, a PKI based signature is added to the document using one
of the supported security tokens.
(5) Multiple digital signatures can be added to the document.
(6) The final document, with all handwritten and digital signature fields embedded in the document.
Supported PKI hardware & suppliers
• Belgian Eid
• Vasco Digipass PKI keys
• Keynectis K-Sign
• Certipost
Signature capturing devices
• Topaz signature pad
• Stepover signature pad
• Wacom Bamboo pad
• Tablet PC with Stylus
LetterGen nv - Koloniënstraat 11 - 1000 Brussels / Groene Hofstraat 31 - 2850 Boom - Belgium
RPR Antwerpen - BTW BE 0467.046.486
www.lettergen.com - info@lettergen.com Tel +32 3 450 89 80 - Fax +32 3 450 89 89