Do not assume private price protection binds the government. Use the applicable official terms and clarify any real conflict.
Distinguish a private agreement from government payment instructions
Current published principal gifts are US$1 million individually and US$2 million under corporate sponsorship after vetting, plus US$15,000 nonrefundable processing per person. This page does not invent a transition rule or decide the legal effect of a particular earlier payment.
A gift should not be marketed as capital expected to produce a return, and neither route carries an approval guarantee. An engagement letter setting out a firm's own fee schedule is a contract between the applicant and that firm, entirely separate from whatever the government itself publishes for its own charges, even though both appear in the same overall budget. Reviewing an older engagement letter should include asking the firm to reconfirm two things independently: its own fee, under whatever terms currently apply to that firm, and the government's published figure, checked directly rather than copied from the original document. Because either figure can change without the other changing, treating them as a single bundled number risks missing an update to just one side of the budget. Requesting a short written confirmation that states both figures separately, with the date each was checked, gives a record that can be trusted later even if the original engagement letter is now out of date.