The business should first establish which booking is affected and who is the guest’s contractual counterparty. It should then record the cause of the missing accommodation, available alternatives and expected additional costs. A prompt and serious search for a replacement may limit the consequences, but it does not remove the need to compare the offer with the agreed service.
Every solution should be summarised in writing. Include the replacement address, category, meals, transfer, payment arrangements and dates. If the guest accepts only provisionally, the hotel should not automatically record this as a waiver of further claims. If the hotel makes a voluntary goodwill payment, its scope should be clear where it is not intended as a final settlement.
For later questions, the booking, availability records, internal communication, replacement offers, payments and complaint should fit together. A factual record helps both sides. It also prevents a later claim for additional costs from being counted twice after a refund or another benefit has already been provided.