As long as your representation is in writing, it can be by email, via an online application, or in a letter.
Keep your comments to the relevant issues. For example, a relevant planning issue may include whether allowing more houses to be built in the area will create traffic congestion.
Your comments may also support a proposal.
If your comments are specific to any documents that are part of the application, it is helpful to include quotes, page numbers or clause references.
You should give your reasons for your opinions and if you are presenting factual information, identify the sources or documents that support that information. Refer to any specialist qualifications or knowledge you have, if it is relevant to your comments.
Make sure your comments are received by the due date or you may miss the opportunity for them to be taken into account.