Canada Post has computers to scan addresses with the ideal format, making these items move faster. A wrong code can be as bad as a wrong phone number. Make sure your document, book, or parcel will arrive at the destination without being damaged. Documents that slide loosely inside envelopes will probably tear loose. Bundling letters protects them from being crushed or bent.
Rush jobs produce compromised results.
Make sure you have adequate resources, mailbags or containers, postage, and the materials for packaging. And prepare address data well in advance. Labels look more professional than handwritten addresses, particularly when they are not legible. The most important address information concerns the department. This is especially true of magazine subscriptions and bulk mail.