The doctor's office will ask you to sign something before it says a word about your father. That form is a release, and it decides what the office can tell you, to whom, and for how long. Most adult children sign it at the front desk, in a hurry, and find out later what they agreed to. This piece covers the four parts of that form that matter and what to ask before the pen touches paper.
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Check who is named
Look for your name written out in full, with the relationship stated in the form's own words. If the form says the office may share with a family member, ask which family member the office will recognize. A form that names no one, or names the wrong person, gives you a document you cannot use at the window. Also check whether the form has a line for his own signature, or a representative line that someone else fills in. Those lines mean different things, and the office should tell you which one applies to your situation.
Check what it covers
A release can be narrow or wide. Read the list of record types: visit notes, lab results, medication lists, billing, imaging, and any mental health notes. Some releases cover only the visits named on the form. Others cover everything the practice holds. Ask the office to read the list back to you in plain words, and ask whether it covers phone calls, portal access, or scheduling conversations at the desk. If something you need is missing, have it added before you sign, or get a second form for it.
Check how long it lasts
Every release has an end. Some run for a fixed term, some end when a stated event happens, and some continue until the patient revokes them in writing. You need to know which kind you signed. Put the end point in your phone the day you sign, and ask the office how they will let you know it is coming up. A release that lapses in the middle of a recovery is an easy way to end up at the window with nothing in hand.
Check the revoke route
Ask how your father can take the release back, and whether he can do it without you. Ask whether the office will honor a written request from him directly, and whether he gets a copy when he signs. He is the adult whose records these are, so he should know what he agreed to and how to end it. A release a parent cannot see or undo tends to become a fight later, and keeping him in the loop protects the relationship you need for the rest of this.
What a release does not do
A release lets the office talk with you. It does not give you authority to make his medical decisions, and it does not give you control over his bills or his bank accounts. If you need that kind of authority, the question is whether he has signed a power of attorney, or whether a court process is required. Those are separate documents with their own wording. If the wording of anything is unclear, ask a lawyer who handles elder matters where you live. Do not accept a front desk's summary of what the paper covers. Read the paper.
Tonight's move
Tonight, pull out the release you signed, or the blank one the office gave you. Write four lines on a sheet of paper: who is named, what records it covers, when it ends, and how it can be revoked. If any of the four is blank or unclear, call the office in the morning, ask for the records desk or the practice manager, and ask them to put the answer in writing. Keep the copy with the other papers you use for his care. The next time someone at the desk asks for a signature, you will be reading the line, not guessing at it.