Buhari said this in a statement released in
Abuja on Saturday by Malam Garba Shehu, the Head of the President's Media Team.
The statement was in response to allegation that some important personalities were stopped at the airports on Saturday.
It said that the officials of the immediate past government should not be subjected to undue harassment or intimidation at the airports.
It said that the officials were allowed to move freely as required by law and should not be disturbed at any point of entry or exit.
''We have not banned anyone from travelling,'' the statement said.
It said that Buhari had directed all agencies to run their affairs in full compliance with extant rules, regulations and the constitution of the country.
''Unless otherwise directed by the courts, no law-abiding citizens should be barred from travelling abroad.
''We must treat fellow citizens with courtesy and respect.
''Officials at the borders and other points of entry and exit should conduct their affairs in strict compliance with due process.
''No one has my permission to bar anyone from travelling abroad,'' the statement quoted Buhari as saying.