Not issuing negatives infringes on consumers' rights and interests.

Legal analysis: 1. It is illegal for guests to take pictures in a photo studio without negatives.

2. Whether it is a wedding photo or the original negative of the photo, the photo studio should deliver it to consumers unconditionally. Shooting negative-free photos in the studio violates the principles of honesty, trustworthiness, fairness and justice, and belongs to the "overlord clause", which cannot be changed even if consumers sign and agree.

Legal basis: People's Republic of China (PRC) Consumer Protection Law.

Article 52 Where a business operator provides goods or services, causing damage to consumers' property, it shall bear civil liabilities such as repairing, redoing, replacing, returning goods, making up the quantity of goods, returning the payment for goods and services or compensating for losses in accordance with the law or the agreement of the parties.

Article 53 Where a business operator provides goods or services in advance, it shall provide them as agreed. If it is not provided in accordance with the agreement, it shall fulfill the agreement or return the advance payment according to the requirements of consumers; And shall bear the interest of the advance payment and the reasonable expenses that the consumer must pay.

Article 54 Where a consumer requests a return of a commodity that has been identified as unqualified by the relevant administrative department according to law, the business operator shall be responsible for the return.