If I understand correctly, you want to use an offline wallet, but you still want the ability to automatically receive payments which will credit to user accounts.
yes
If you assign a public key to each user account, then you can monitor each public key's transaction log to look for incoming transactions (since all transactions are public). The difficulty will be in automatically generating new addresses for new accounts. You could pre-generate some keys in the offline wallet, but you would need to generate more when they have all been used.
As far as coding it, you might could save some time by using blockchain.info's API to monitor for new transactions: http://www.blockchain.info/api
As far as coding it, you might could save some time by using blockchain.info's API to monitor for new transactions: http://www.blockchain.info/api
if incoming money is automatically registered to users playmoney account, then only one receiving address would be enough, as long as it i added to the right user
how would that be done ?
first time user creates account,
my only receiving address is displayed, but how will I know to add money to exactly his account ?
Are merchant solutions offering this kind of service ?
and I would not be interested in users actual identity ...