First of all, I KNOW there are multiple threads here covering this topic. I've just spent the last three hours calling, tweeting and walking around Amsterdam to various cash exchange services, banks and ATMs based on those old threads.
I'm posting this partly as a plea to Bunq to figure out a workaround for this extremely obvious and annoying problem they have created; but more so that folks who have this problem in the future have more current information than is currently available here.
I have a bunq account in the Netherlands, an ING account in Belgium (where I frequently work) and a Transferwise account to move money between those and an American account. I also have a big pile of cash thanks to a landlord who decided that paying back my deposit in cash was easier for her. I had no idea what an absolute nightmare it would be for me.
There is no way, that I can see, to take cash to any ATM, any in-person cash exchange/transfer service or to any live bank teller/branch in this country and have it deposited into an account that is not ASN or SNS — unless you have an account at that bank.
Previous updates here have indicated that, for a fee, you can go to a GWK/Travelex branch and either make a deposit using their ATM (by manually entering your IBAN) or over the counter with an agent. I can confirm this is not a service they offer any longer — they can only manually take deposits if you have account with ASN or SNS.
More updates have suggested that some ABN-AMRO branches or ATMs will allow the same thing. This is also not the case. They have some outlets that allow you to deposit coins and enter a non-ABN account number to receive the non-coin deposit. This is not possible with paper bills, per their customer service rep.
So! That's a long way of saying that every previous suggestion for how to deal with this is either out of date, or was always incorrect, or both.
If anyone has a working method for making a cash deposit to a bunq account, I am indeed all ears (and would be forever grateful). If someone with Bunq is reading this, MY GOD, you are a bank, HOW ON EARTH is it not possible, anywhere in this entire country, to accept paper money as a deposit? As long as cash is still used as currency, which it is, this should not be a service people have to beg for.