You should receive an invoice within a reasonable time after the delivery of the good or service. However, there is a general ten-year statute of limitations on debts. Invoices sent after that deadline are no longer valid. There are some exceptions, such as gas, electricity and water bills, where different rules apply.

If the company claims to have sent the invoice but you haven't received it, first check whether the (e-mail) address provided is correct. If the address is incorrect, you can ask the company to waive any reminder fees. If the company does not agree, you can dispute it in writing. The company must take your objection into account and may not charge you until it has addressed and refuted your arguments.