Adding a bank in PayPal is easy especially if you are a POSB/DBS client. But first, you need to know some bank codes to be able to proceed. I did not easily find the needed information from the DBS website (I know it's somewhere there but I just can't find it even after scouring the ibanking system). Luckily, UOB has a list of the codes needed as pointed out in the PayPal forum.

So in case I need it again, I'm posting it here. It's not just for my benefit but also for those who happen to stumble in my site.

Bank Name : Post Office Savings Bank Institution Code : 7171 Branch Code : 081 Account No : [your 9 digit account number without the dashes]

IMPORTANT NOTE:

1. All POSB branches have the same branch code -- 081. The actual branch is embedded in the 9-digit account number.
2. This is only applicable for POSB accounts with 9 digits account no. Those with 10 digit account numbers must refer to their own respective branches.
3. Your account name in this form should be the same as your account name in your bank. Otherwise, there will be a SGD5 return fee that will be charged on your paypal account.

For reference, here's the screenshot of PayPal's add bank account screen.

You want to see the full list HERE. It's quite handy especially for UOB and DBS Clients. Here's the actual URL.

http://www.uobgroup.com/assets/pdfs/global/achcode.pdf

By the way, be aware of the reminder/disclaimer posted by UOB.

PLEASE NOTE: UOB will not be held responsible for any errors or omissions that may appear in the guide. For updates of the codes, please refer to www.uobgroup.com/ACHcodes. For DBS enquiries, please call 1800 339 6666. For OCBC enquiries, please call 1800 438 3333.