The phrase "a request to postpone" is correct and usable in written English.
You can use it when you are formally asking someone to delay or defer an event, meeting, or deadline.
Example: "I am submitting a request to postpone our meeting scheduled for next week due to unforeseen circumstances."
Alternatives: "a plea for delay" or "a proposal to defer".
On May 29th the European Commission approved a request to postpone by two years, to 2015, France's target for cutting its budget deficit to 3% of GDP.
A20 Judge Upholds War Memorial A federal judge ruled against opponents of a World War II memorial on the Mall, rejecting a request to postpone construction.
One of the jailed members of Pussy Riot has been denied a request to postpone her prison term while she cares for her five-year-old son.
The Confederation of African Football has "concerns" over the Ebola outbreak, despite rejecting a request to postpone the 2015 Africa Cup of Nations.
With up to 15 players potentially out for the game on Friday through suspension or injury, Salford had a request to postpone the game rejected.
Perhaps the best sign of this Palestinian anger came when, under intense US pressure, the Palestinian delegation at the UN Human Rights Commission agreed to a request to postpone discussion on the Goldstone report until next March.
In return, as a compromise, the US, Britain and France had to accept a Russian request to postpone any action by the council for a month.
Judge Brinkema swept aside a defense request to postpone the trial until next year, dismissing defense contentions that the complex international nature of the case, publicity and complex classified evidence would require additional time.
Another question some political critics are asking: If this is how Rick Perry handles a seemingly reasonable request to postpone an execution for 30 days, how would he handle a decision on whether to deploy nuclear weapons during a threat of war?
A federal judge in Riverside, California, then agreed to the government's request to postpone a hearing scheduled for Tuesday afternoon so that the FBI could try the newly discovered technique.
The National Labor Relations Board yesterday denied New York University's request to postpone a unionization vote by graduate students.
