My experience: Opened the account last year at the end of August and put 50k with BlueOr. I posted the withholding tax documents to Revenue around the end of September. I got them back after 2 weeks. I signed them with ink and sent them to Raisin in early October. After almost two months (it was the 24th December) I got a mail from Raisin telling me that they were forwarding the signed documents to BlueOr. Since then I have heard nothing back, so I suppose my documents are all ok and the withholding tax will be reduced. Some people had the documents returned by BluOr due to some issues with the signature not being in printed ink, or something like that.