This is an interesting read as well.
Gifts by Clients
Accepting, Rejecting and Hesitating
Even though there is some hesitation to discuss gifts openly, most psychotherapists view it neither as ethically problematic nor mind accepting gifts of small value, such as home baked cookies or bread, books or CDs or a potted plant (Borys & Pope, 1989; Pope, Keith-Spiegel, & Tabachnick, 1986; Pope, Tabachnick, Keith-Spiegel, 1987; Tabachnick, Keith-Spiegel & Pope, 1991). Small and symbolic gifts from clients during the holiday season, at termination, after a particularly difficult emotional challenge or from young children have been the most common and largely uncontroversial types of gifts (Borys, 1992; Borys & Pope 1989). This level of acceptance of small gifts has also been reported among forensic professionals (M.D., PH.D., MSW, MA) by Gerson and Fox (1999). Generally, small and symbolic gifts have been viewed as enhancing the therapeutic alliance and are tied to positive clinical outcomes (Corey, Corey, Callahan, 2003; Hahn, 1998; Spandler, et. al., 2000; Zur, 2004, 2007).
Most clinicians and ethicists also agree that rejecting appropriate gifts of small monetary value but of highly symbolic and relational value can be offensive to clients, cause clients to feel rejected and thus is detrimental to the therapeutic alliance and the therapeutic process (Knox, et. al., 2003; Spandler, et. al., 2000). Massoth, a member of the American Psychological Association Ethics Committee, reported in the
Monitor of Psychology that ". . . psychologists may do more harm than good if they refuse a reasonable gift" (Bailey, 2004, p.62). In contrast, excessive gift-giving and clients' gifts of high monetary value, insider stock market tips or gifts given as financial loans by clients have, understandably, been a concern for many therapists, ethicists and licensing boards (Corey, Corey, Callahan, 2003; Lazarus & Zur, 2002, William, 1997).
http://www.zurinstitute.com/giftsintherapy.html