Applications
What to do after receiving an offer letter

In short
Read the conditions first and write down the date each one must be met. Then work backwards: the deposit deadline, the date your funds must start sitting still for the visa route, and the document requests that depend on a slow third party such as a university records office or an evaluator. Most offers that lapse do so on a date nobody diarised.
An offer feels like the end of a process. Administratively it is the start of a shorter one with tighter deadlines and less forgiving counterparties.
This is the sequence we use with clients in the week after an offer arrives.
Read the conditions as instructions, not formalities
A conditional offer lists what must be true before it becomes unconditional: a final transcript, a specific English score, sometimes a particular grade in a pending result.
Write each condition on a line with the date it must be met and the person who can produce the evidence. If a condition depends on a university office, you are now dependent on their calendar rather than yours.
If a condition is unachievable, say so now and ask whether it can be varied. Universities do sometimes adjust, and the request lands far better in month one than in week minus two.
Start the two clocks that run in the background
The first is money. Visa routes expect funds to have been held, not merely to exist: the UK counts 28 consecutive days, and other systems ask awkward questions about recent deposits. Moving money into the right account early is free; moving it late can cost an intake.
The second is documents. Transcripts, apostille, and any credential evaluation run on third-party timetables measured in weeks. Start them the week the offer arrives, not the week the visa application opens.
Then the irreversible decisions
Deposits are usually non-refundable, and the deadline is in the letter. Do not pay one while you are still seriously weighing another offer, and do not let the date pass while you wait for a decision you could have made.
Accommodation deposits and flight bookings sit on the far side of the visa decision for most people, and anything booked before it is a bet. Some applicants take that bet knowingly; the mistake is taking it without noticing.
What the statement has to do now
For many destinations the visa file wants its own account of your plans, separate from the admissions statement: a study plan, a statement of purpose for the visa, or a letter of explanation addressing anything unusual in the file.
It has to be consistent with what you already told the university. Two documents that describe the same person differently are worse than one plain document, and reconciling them is a large part of what we do when a file comes to us after an offer.
Related questions
Should I accept an offer before the visa decision?
Usually yes, because most visa routes need the institution's confirmation of acceptance before you can even apply. The question is how much money you commit at that point.
What if my final results come after the deadline?
Tell the admissions office now, in writing, and ask how they handle pending results. Many have a standard process for it, and silence is the only response that guarantees a problem.
Can I switch programmes at the same university after accepting?
Sometimes, before enrolment and at the department's discretion, but it can affect visa documents already issued. Ask before you pay anything that depends on the original programme.