Your agreement should spell out what use the distributor is allowed to make of your trade marks and other intellectual property. For example, the agreement might include that the distributor is prohibited from altering your product packaging.
Intellectual property can be a complex area. Unless your agreement is carefully drafted, there can be unintended consequences - for example, the distributor may become entitled to some of the value of the intellectual property.
Confidential information can be protected with suitable terms in the agreement. These need to include how confidential information will be protected after the distribution relationship is terminated.
