Online form in TYPO3 (free of charge): If you do not need an online payment, the Web Content and Development Staff Unit can support you in setting up a form (Powermail), e.g. within your institution homepage. Helpful tips for this tool can be found in the TYPO3 introduction, chapter 5.11.
Other and fee-based alternatives: The use of other or even fee-based alternatives is of course open to you. However, no advising or financial support can be provided by the Web Content and Development Unit.