1. to stamp or mark (something) in advance, before the usual or final time

Examples

• The postal service will prestamp the envelopes so customers don't need to add their own stamps.
• We decided to prestamp all the invitations before the event coordinator arrived.
• The library prestamps books with the due date to speed up the checkout process.
• Many companies prestamp their outgoing mail to ensure consistent postage.
• The vendor prestamped the documents with the company logo before distribution.