In contracts where some formal requirements are required by law that and are not fulfilled, the contract may be considered null and void.
Usual practice of signing contractual agreements in the B2B sector
It is becoming more and more common in practice to sign B2B contracts electronically. The crisis caused by COVID-19 has probably accelerated its use.
Usual practice of signing contractual agreements in the B2C sector
It is also becoming more and more common in practice to sign B2C contracts electronically. The crisis caused by COVID-19 has probably accelerated its use as well.
In principle, we are not aware of any type of contract, where it is usual to sign it with a handwritten signature. There are companies, such as Docusign or Signaturit, which provide the biometric digital signature. This type of signatures can be valid if they comply with the requirements for the digital signature established at the European Regulation 910/2014.
However, most consumers do not sign by means of digital signature or electronic signature, but by means of electronic contracts. According to the Law 34/2002, of 11 July, on Information Society Services and Electronic Commerce, amended in 2020: Contracts concluded by electronic means shall produce all the effects provided for by the legal system, when consent and the other requirements necessary for their validity are met (article 23).