How to politely decline an invitation to bid letter without burning any bridges with the client.
Dear Mr. Lamont,
Thank you for giving us the opportunity to bid on your requirements for the upcoming Relief Goods Charity.
We are not, however, submitting a bid at this time because we are unable to meet your supply demand and delivery schedules. At present, we are unable to supply the large amount of canned good products to the Bay Area.
We want to remain on your bid list and, perhaps on future quotations, to bid by product within these areas where we can supply.
Thank you for your interest in our company.