Promissory note

Glossary category

What is a promissory note?

A promissory note is a written financial instrument in which one party promises to pay a specified sum of money to another party. In Polish legal practice, it corresponds primarily to a weksel własny, regulated by the Polish Law on Bills of Exchange and Promissory Notes of 28 April 1936. It is used as an independent obligation to pay, separate from the underlying contract or transaction for which it was issued.

A promissory note is not merely an acknowledgement of debt. It creates a formal payment obligation that may be enforced under the rules applicable to bills and promissory notes. Its legal effect depends on strict formal requirements. Under Polish law, a promissory note should generally include, among other elements, the term “promissory note” in the text of the document, an unconditional promise to pay, the amount due, the maturity date, the place of payment, the name of the payee, the date and place of issue, and the issuer’s signature. Some omissions may be supplemented by statutory default rules, but other defects may render the instrument ineffective as a promissory note.

The key practical feature of a promissory note is its formal and abstract nature. In many cases, the person seeking payment does not have to prove all details of the underlying business relationship at the initial stage. This makes the instrument useful as security for payment, but also creates risks for the issuer if the document is signed without proper safeguards.


What is a promissory note used for?

Promissory notes are commonly used to secure monetary obligations. They may appear in commercial contracts, loan arrangements, settlement agreements, leasing, distribution agreements, construction projects, or transactions involving deferred payment. A creditor may request a promissory note to strengthen its position if the debtor fails to pay on time.

In business practice, a promissory note can support debt recovery by providing a structured basis for claiming payment. Depending on the circumstances, it may help simplify evidentiary issues in court proceedings. It can also be transferred to another entity, if the instrument and applicable law allow such transfer. This feature is important in financing, debt trading and intra-group settlements.

A specific type frequently encountered in Poland is a blank promissory note, known as weksel in blanco. It is signed before all required elements are completed, usually together with a declaration or agreement specifying when and how the creditor may fill it in. This mechanism is practical, but sensitive. The declaration should precisely define the secured obligation, the maximum amount, maturity rules, events triggering completion of the note, and the procedure for notifying the issuer. Without clear documentation, disputes may arise over whether the note was completed correctly.

A promissory note should also be distinguished from a bill of exchange, guarantee, suretyship, ordinary debt acknowledgement, or contractual penalty. These instruments may serve similar economic purposes, but they differ in legal structure, enforceability, defences available to the debtor, and formal requirements.


When is it advisable to seek legal assistance with a promissory note?

Legal assistance is advisable before signing, issuing, receiving, transferring, enforcing or disputing a promissory note. For private individuals, this may be relevant in loan arrangements, settlements with creditors, family business transactions or security given for another person’s debt. For businesses, promissory notes are often connected with supply contracts, credit facilities, investment transactions, management liability, shareholder settlements or restructuring negotiations.

Before issuing a promissory note, it is important to assess whether the instrument is necessary, proportionate and consistent with the underlying transaction. The issuer should understand the consequences of signing the document, especially if it is a blank promissory note. The creditor should verify whether the wording and form of the note meet statutory requirements and whether the accompanying documentation allows effective enforcement.

Legal advice may also be required when a promissory note is presented for payment, when the amount inserted into a blank note is disputed, when the debtor raises objections, or when the creditor intends to initiate court proceedings. In cross-border matters, additional issues may arise, including governing law, jurisdiction, language, currency, place of payment and recognition or enforcement of judgments.

A prompt consultation with a lawyer can help avoid formal defects, invalid security, excessive exposure, disputes over completion of a blank promissory note, enforcement difficulties, liability risks or financial loss. In many cases, the most important work is done before the instrument is signed, because later correction of defects may be limited.


Legal support in matters involving promissory notes

Support from a law firm in relation to promissory notes may include in particular:

  • reviewing and drafting promissory notes and blank promissory note declarations,
  • assessing the validity and enforceability of promissory note obligations,
  • advising issuers, payees, creditors, debtors, shareholders and management board members,
  • structuring promissory notes as security in commercial transactions, loans and settlements,
  • preparing documentation for completion of a blank promissory note,
  • representing clients in payment disputes and debt recovery proceedings,
  • analysing defences against claims based on a promissory note,
  • advising on transfer, endorsement and cross-border aspects of promissory notes.


Need assistance with a promissory note? Contact us.


See also

  • Debt Recovery
  • Commercial Law
  • Business Dispute
  • Civil Litigation