It is good practice to mainain close links with volunteers and review their performance periodically in order to identify any issues before they become problems.
It is good practice to review a placement after the 1st 4 - 6 weeks. This may either be done by personal visit, or by telephone or email. Whilst telephone and email are satisfactory, the personal visit may uncover small areas of concern or confusion that can be immediately and easily dealt with, ensuring volunteer contentment and retention.
Thereafter, 6 monthly follow up reviews will help to ensure that the placement is still satisfactory for all concerned (please note that with large numbers of volunteers it may be very hard to keep track of review dates and ensure that everyone is up to date).
This is an area that needs judgement and sensitivity as follow up reviews may not be necessary or appropriate, where you know volunteers are receiving good, ongoing support from the local manager. This is particularly so, where you have good relationships between Voluntary Services and local managers and can rely on them to contact you if they have any concerns about their volunteer. In such cases, it is perfectly fine to 'let sleeping dogs lie' - you probably have more than enough other volunteers to review. However, be aware that volunteers may wish to have regular reviews so that they can give feedback on their role, the service or the organisation.