President Donald Trump is refusing to say whether he has donated any part of his presidential salary after pledging not to touch a single dollar of it, a report stated Sunday.

The mogul announced in his first interview as president-elect in November that he wouldn't take the $400,000 annual salary reserved for the commander-in-chief.

Federal law, however, dictates that the president must receive the sum, and that it should be paid monthly. To comply with the obligation, a Trump aide said last month the president would instead donate his salary or give it back to the Treasury.

But requests from MSNBC asking for details about about any salary donations made by the president have all been rejected, the network reported.

President Donald Trump is refusing to say whether he has donated any part of his presidential salary after pledging not to touch a single dollar of it, a report stated Sunday

Trump told 60 Minutes' Lesley Stahl in November: 'I'm not going to take the salary,' adding: 'I think I have to by law take $1, so I'll take $1 a year.'

The law in fact indicates that he must receive a monthly salary of $33,333. This prompted spokeswoman Sarah Huckabee Sanders to tell Politifact in January: 'He is required to get a paycheck but will be giving it back to (the) treasury or donating.'

President Trump's promise to give up his presidential salary dates back to his presidential campaign, when he told the crowd at a rally in Rochester, New Hampshire: 'The first thing I'm going to do is tell you that if I'm elected president, I'm accepting no salary, okay? That's not a big deal for me.'

Trump's first paycheck should have come on February 20, a month after the inauguration, and the next one should be expected for March 20.

MSNBC reached out to the White House, the Treasury Department and the Office Of Personnel Management on Wednesday asking for details about salary donations made by the president

All three departments declined to say whether Trump has made any donations to date, and the Office Of Personnel Management referred the question to the White House, MSNBC reported

MSNBC's chief legal correspondent Ari Melber reached out to the White House, the Treasury Department and the Office Of Personnel Management on Wednesday and asked them to provide details and documents about salary donations made by the president until now.

'Has Pres. Trump accepted and deposited the funds for his first paycheck?' the network asked in a letter.

'Has Pres. Trump donated the funds from his first paycheck, and if so, to what entity (Please provide documentation.)'

'If not, when does Pres. Trump plan to donate those funds, and to what entity?'

'In the potential absence of documentation confirming donation of the first paycheck, what is the Trump administration’s position on the President’s pledge to donate his salary? Has the President’s reversed his decision, or does the President plan to delay donating the salary as he receives it each month? If so, on what date does the President intend to donate his salary?'

All three departments declined to say whether the president has made any donations to date, and the Office Of Personnel Management referred the question to the White House, MSNBC reported.

If President Trump ends up donating his salary to charity, he won't be the first one to do so. His predecessors John F Kennedy and Herbert Hoover both parted with their earnings.