This study was designed to test the viability of two multiple request techniques of behavioral influence for recruiting blood donors by telephone. The first technique utilizes a small antecedent request to encourage behavioral involvement and favorable disposition toward the target activity of the critical request to donate. The second approach frames the critical request as a concession following refusal of a very large request. The two techniques, dubbed the foot-in-the-door (FID) and door-in-the-face (DIF), respectively, were tested against a control condition on three donor groups: active donors, inactive donors, and nondonors. Thus, a three-by-three factorial design was used on 910 adults in a Midwest city. Although the DIF was outperformed by the control across all three donor groups, the authors recommend its continued study in face-to-face donor solicitation. Importantly, the FID approach produced more donations than the control condition among active donors (Z = 4.30; p less than .001), inactives (Z = 7.45; p less than .001), and nondonors (Z = 1.98; p less than .05). For managing the blood supply, the FID is particularly potent for rekindling donations from inactive donors. Additional research on means of penetrating the nondonor segment is recommended.