Thank you.
It seems to be based on the precepts of American law, which may apply differently in Britain.
But I plucked out this:
Also, the desire for reward money could motivate an abductor to keep a child alive.
Clearly state the purpose of the offer. First decide what you want the reward to accomplish, then make sure that this purpose is clearly spelled out in the offer. For example, it is a good idea to make your child's safe return a written condition of the reward. The better the description of the reward's purpose, the less likely it is that you will have to argue later over whether someone complied with the terms of the offer.
Set a time limit for the reward. One of the goals of a reward is to generate immediate results in order to get your child back quickly. In the beginning, you may want to keep the time limit fairly short and tie it to a significant event, such as your child's birthday. The drama of such a countdown could generate substantial public interest. Avoid open-ended rewards that can result in liability many years later. You can always renew the reward for a longer period of time.
Don't know.