This question might have multiple layers to it.
I have been taking photos of people for the past two years. These people of course have verbaly consented to this. You could call them amateur models.
For the past year, I have been told by various people that I should release some of the photographs, as they are really good.
Most models are adults, but some are minors (17 yrs old). There is no nudity involved, naturally.
To promote my pictures locally, I intend to print some of them on Postcards. As I have resolved the technical issues and am about to sign a contract with a professional printing service, the legal issues have come to bugger me.
I don't intend to earn a lot of money with these postcards. But I do want to cover my expenses by selling them for a minor amount of money.
I don't know if that already qualifies as a commercial endevour.
All models have given me verbal consent on printing their pictures.
I did however read that I should let them sign a release form. But only if I intend to sell the postcards in a comercial fashion.
Also I've read that for my underage models I need a written consent of their parents.
Do I need written consent from the adult models? Even if I don't intend to make money of their pictures.
And do I need written consent from the parents of my underage models, aswell?
Post Script: I currently live in Germany.
I guess the relevant portion of the question is:
Does selling the postcards for an amount of moeny that covers their production cost constitute making money?
Short answer, sometimes. If you only intend to upload them online, then you generally don't need written permission (some websites do require it though) however it can be a good idea to get permission anyway especially if you are photographing people you don't know well or at all. This will protect you should someone change their mind about having his/her photo posted online and sue you for supposedly not obtaining their consent. Extreme scenario, but it can happen and it's better safe than sorry.
If you are going to be making any money at all, then yes definitely. You need to make sure the consent form contains all relevant information regarding the shoot including whether the model is being paid, whether the model will receive a portion of the sales profits and how much, etc. If the model is a minor (where I live, under 18 is considered minor, however this varies by jurisdictions) then the parent must sign the form not the model him/herself. Make sure you adhere strictly to the consent form because if you do something outside of what the consent form allows, no matter how seemingly small and insignificant, you are in breach and the model has the right to take legal action against you
Remember, laws vary by jurisdiction, so my advice is to do some research including studying sample model release forms which can be found online easily
If you need any further clarification, just say so