I've spoken to a number of experts about what to do if you feel you should be getting a share of the £1.3 billion in compensation.
If you were told you would be liable for costs if money was taken from your account, or the risks of having your ID stolen were exaggerated, you could have been a mis-selling victim.
If this applies to you, you should write to the insurer. If they do not reply within eight weeks, you should contact the Financial Ombudsman Service (0800 023 456).
More top news
The Metropolitan Police Federation, which set up the official JustGiving site, said it felt a "suitable amount" had been collected.
There is no evidence the Westminster attacker Khalid Masood was associated with so-called Islamic State or al Qaeda, the Met Police said.
Janet Ajao said in a statement: "I do not condone his actions nor support the beliefs he held that led to him committing this atrocity."