What is the scholarly opinion regarding teachers' salaries during the summer vacation?

If the teachers' contracts with institutions stipulate their presence at their service locations during holidays, they must fulfill these contracts. Their salaries are not permissible for them unless they complete their work in the agreed-upon manner. Signing on behalf of someone else is deception and not permissible, unless the supervising authority permits its employees to do so; in that case, there is no objection.