Multi-channel communications and transactions with full legal probative validity

Post, email, SMS, web, app and audio

Legal security in physical and electronic multichannel communications and transactions in the hands of a trusted partner

The digital transformation of companies and institutions in their relationships with customers, the public, employees and suppliers that implies a legal value which demands the preferential use of electronic channels, without forgetting the physical channels, certified by a Trusted Third Party in their communications and transactions.

MailTecK & CustomerComms offers services and solutions for the certification of communications and notifications, both electronic and through post or telephone, as well as electronic signatures, consents and certified web publications within the legal environment of Trust Services, as defined by the eIDAS European regulations.

The maximum legality and safety of all communications and transactions is guaranteed through post, email, SMS, web, app and audio, with the electronic and notarial custody of the content of the communications and the Evidence Certificates, using an integrated communications platform: CertySign.


Integrated platform for multichannel communications and transactions

Securely and comprehensively generates and manages all multichannel communications and transactions with legal value to the company and its customers and suppliers using the most efficient channels or combinations of channels.

Esquema CertySign

MailTecK & CustomerComms are the Trusted Third Parties who intervene and guarantee both the security of the information and the legal security in the communications and physical and electronic multi-channel transactions of your company.

We intermediate by interposition in a neutral and independent manner between the parties and we safeguard the contents and evidence generated with the possibility of adding notarial intervention.

We protect your company’s data

Certificación ISO 27001

We have the ISO 27001 certification that guarantees us as guarantor of the security in the processing of your data. In this manner, only authorized users can access the data without risking integrity and confidentiality.

Trusted Third Parties

Ministerio de Energía, Turismo y Agenda Digital

We are part of the group of trusted service providers of the Ministry of Economy and Business for certified communications, electronic contracting, certified web publication and digital custody in accordance with European eIDAS regulations.



Platform for all your legal communications

SLegal security

Legal security

Maximum legal guarantee of your communications and transactions

Trusted Third Parties

Trusted Third Parties

Certification and digital custody of communications and evidences



Services available from PC, mobile and tablet


Asociación Europea
Defensor del pueblo
MMT Seguros
Viajes el Corte Inglés


Avenida de la Recomba 14
P.E. La Laguna
28914 Leganés · Madrid
+34 916 895 665


Calle Balmes, 200
Planta 6º Puerta 4º
08006 Barcelona
+34 934 152 445


P. I. Ribera de Axpe, 11
Edif. BL-206-B-2ª
48950 Erandio · Vizcaya
+34 944 646 412


Rua Cidade de aveiro, 7A
Z.I. de Frielas - Arm. C2-C3
2660-018 Frielas · Portugal
+351 21 366 02 80


470 Atlantic Avenue, 4th floor
02210 Boston · Massachusetts
+1 617 273 8000

Contact us

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