There are debates regarding the legality of this without any condition
stated in T&C.
This is just an example
In general If this was legally a bank account blocking, merely receiving an informal request from law enforcement such as police would not be sufficient. The new KUHAP (criminal code) treats account blocking as
a coercive legal measure. So, the statutory requirements for a coercive measure would have to be satisfied. Such a blocking
must obtain permission from the Chief Judge/Chairman of the District Court (Ketua Pengadilan Negeri).
But, as with many things in Indonesia, rules can sometimes be interpreted or applied selectively. And this becomes even more concerning when there is no effective or functioning ombudsman. The good example is the blocking of bank accounts of ordinary people including saving account for those who do not asses it for more than three months last year.
If this happened in a developed country with a strong financial regulator and an effective banking ombudsman, having your bank account wrongly blocked could potentially give you grounds to seek compensation. If you could demonstrate that the restriction was unlawful, unjustified or improperly handled, and that it caused significant financial loss or other serious consequences, you might be entitled to compensation. Yes there is a law regarding AML/CTF but that is differing things.
This one is not true. You are probably talking about an isolated case.
In many UK high-street banks, you can typically walk into a branch and withdraw more than GBP2,000 in cash over the counter without prior notice, although the exact amount varies between banks. Around GBP5,000 is a common threshold at many high street banks. They will typically needs your debit card and your ID.
For a larger amount, you could still do it over the counter, but the bank will typically require or strongly recommend advance notice, often 1–3 working days, depending on the amount and the bank's policy.