You can control what types of offline gifts Participants are allowed to enter by following these steps:
  1. Go to Fundraising > TeamRaiser.
  2. Click the Edit link for the TeamRaiser you wish to change.  
  3. Ggo to '3.Select Event Options'
  4. Under Related Actions choose 'Edit Advanced Options'
  5. Select 'a.Define Fundraising Options'.  
  6. Look for the option titled 'Offline Payment Types that Participants Can Enter'.  Use the multi-select picklist to choose which types of gifts Participants can enter.   Note: Selecting no types means that all payment types can be recorded.  However, to allow Participants to enter Credit Card gifts your must also check the box ' Yes, allow participants to input credit card information' under ' Offline Gift Payment Credit Card Processing'.