Proof of Funds Certificate vs. a pof.lol Receipt: Which One Do You Need?

Not every proof of funds is the same kind of thing. Some are formal documents for institutions. Others are quick checks between two people. Picking the wrong one costs you either money or privacy.
Two different jobs
A proof of funds certificate is a formal document, often issued for a fee, meant for banks, brokers, property deals or compliance. Those certificates usually show the wallet address.
A pof.lol receipt is a quick shareable link meant for deals and conversations between people, and it keeps the address off the page.
When a certificate makes sense
If an institution asks for a specific document, you need that document. A bank, a lawyer or a formal buyer may not accept anything else. In that case the fee is the price of meeting their requirement.

When a receipt makes sense
If the question is simply whether you can pay, whether you hold what you say you hold, or whether you are serious, a receipt link answers it in about a minute for the cost of a 10¢ transfer.
Side by side
Formal certificate: made for institutions, paid, usually shows the address, takes time.
pof.lol receipt: made for people, 10¢, wallet address not shown, a link you get right away.
Be honest about the limits
A pof.lol receipt is a snapshot of the balance at the moment you made the proof. It is not a live balance and it does not promise the funds are still there later.
A receipt is not a legal document and is not accepted by every institution. If you need a formal certificate, get one.
FAQ
Is a pof.lol receipt a legal document?
No. It is a verified snapshot you can share. Institutions that require a formal certificate may not accept it.
Do I need both?
Only if you have both kinds of requests.
Which one keeps my wallet private?
A pof.lol receipt does not show the wallet address.