Definitions of under seal
of an official document signed and including the seal or stamp of the signer
Most UK corporate contracts do not have to be made under seal.
Phrase Bank for under seal
The document was signed as a deed under seal.
A contract under seal is always valid.
A deed is also known as a document under seal.
Additional Notes for under seal
Historically, seals were made of wax or another adhesive substance. Today, a seal is usually stamped or embossed (=stamped using a special tool that makes a raised mark) on a legal document in order to authenticate it eg a notary stamp or a corporate seal. Although in the past legal papers had to be signed, sealed and delivered, most jurisdictions no longer require documents to be under seal.