POST Office bosses today denied there were plans to close either of their two branches in Huddersfield's town centre.
Top officials spoke out after speculation that some high street branches are under threat because they are losing money.
Councillors were voicing their fears this afternoon at a Kirklees Council meeting.
However, the Post Office says it is planning to invest in its high street branches rather than close them.
Chief executive David Mills said the 555 directly-managed branches had lost more than £70m last year and had to be brought to break-even point.
He denied reports that a review would result in large numbers closing: "This is not a closure programme. It never was.
"We anticipate that fewer than five directly-managed branches will need to close in 2005-2006."
But councillors fear the plug will be pulled on either Northumberland Street or New Street post offices in the centre of Huddersfield.
Protest letters will be sent to Kirklees's MPs and to Government ministers.
Liberal Democrat councillor Roger Battye said: "The recent wave of smaller post offices closing has caused significant concern and difficulties for many people, especially those who are less well-off."
Kirklees Labour councillors will be collecting petition signatures outside the Northumberland Street post office this Saturday between 1pm and 2pm.
Labour group leader Clr Mehboob Khan said: "Both these post offices are always extremely busy with very long queues whenever I go to them.
"I cannot see how Post Office Ltd could be thinking of closures. It seems very bad business to me."
