between US$50 and US$500 equivalent is considered appropriate, depending on the size plexity of the works and the bidding documents.Р?All bids must be panied by a security in the form and amount specified in the bidding documents, and must be delivered to [address and exact location] at or before [time and date]. Bids will be opened immediately thereafter in the presence of bidders’ representatives who choose to attend. Coordinate this paragraph with Clause 25 of Section II, Instructions to Bidders, “Bid Opening.” Also see footnote 4.Р?Please confirm receipt of this letter immediately in writing by cable, fax, or telex. If you do not intend to bid, we would appreciate being so notified also in writing at your earliest opportunity.РYours truly,РAuthorized signature РName and title РEmployer