Bills of Exchange Act 1882: Primary legislation governing promissory notes in England and Wales. Defines valid promissory notes and sets out requirements for form and content.

Consumer Credit Act 1974: Regulates credit agreements and provides consumer protections. Relevant if the promissory note involves a consumer. Sets requirements for form and content of credit agreements.

Limitation Act 1980: Governs time limits for enforcement of contracts, typically 6 years for simple contracts. Important for stating limitation periods in the promissory note.

Contract Law Principles: Common law principles including offer and acceptance, consideration, intention to create legal relations, and capacity to contract.

Doctrine of Forgiveness: Common law principles governing conditions for debt forgiveness and requirements for valid waiver of debt obligations.

Money Laundering Regulations 2017: Regulations that may apply to the transaction, particularly if involving substantial sums or specific types of parties.

Financial Services and Markets Act 2000: Relevant if the promissory note forms part of a regulated financial arrangement or involves regulated activities.

Unfair Contract Terms Act 1977: Legislation ensuring that contractual terms are fair and enforceable, particularly important for any conditions attached to forgiveness.