CBDT also cautions against Political Recommendations for transfers
DDT 2380-23.06.2014 had reported about the CBEC OM regarding representations being received from VIPs and other political sources recommending transfer/posting of officers and reminding the officers about the bar under Rule 20 of the Central Civil Services (Conduct) Rules 1964.
Obviously political pressure for transfers is not unique to CBEC; it is prevalent in CBDT too. So CBDT has also advised its officers to refrain from indulging in such practices henceforth, failing which they will be liable to disciplinary action - if your source is not big enough.