
1) Procurement submission 2) Type of cost estimate
Found on
https://www.crosswordclues.com/clue/sealed-bid

A bid to buy an item, or a cost estimate for a contract, which is kept secret in a sealed envelope until all the bids have been received and are opened together
Found on
http://www.encyclo.co.uk/local/22643

A method of making offers on a property, often adopted if there is a lot of interest. The vendor invites all interested parties to place their highest offer in a sealed envelope to be opened on a specified day
Found on
http://www.encyclo.co.uk/visitor-contributions.php

(PROJECT GLOSSARY) Procedure for handling bids/quotations to demonstrate fairness. Normally the commercial and technical offers are separate documents sealed in their own packaging. Bids are opened in a special meeting where the bid values are recorded and observations minuted.
Found on
https://www.encyclo.co.uk/local/20479
No exact match found.