Technically OK but bluntly verbal contracts are not worth the paper they are not written on.
No, in fact and in law, there is sufficient case law to support that verbal contracts are real and enforceable. In scotland a contract exists if there is an offer by one party and an acceptance by another, there does not need to be any consideration, financial or otherwise.
Verbal contracts are probably the most common type of contract in use every day. Every time you buy anything in a shop or a pub or similar you are doing so by contract and mostly those will be verbal contracts.
The issue though, as has been said, is providing corroboration of a verbal contract.
Getting Scott Allan and a manager who knows how to get a performance out of Scott Allan is enough reason in itself to renew a season ticket, and that's from somebody who is sick of the sight of this season.
Technically he’s signed a ‘pre-contract’ between himself and Hibs that commits him to sign for Hibs for 3 years. There is no reason to think this will not happen although in theory it could. Regards the question of enforceability and how the agreaved party would then pursue resolution, this would probably be thrashed out behind the scenes, and not via legal remedy, should that unlikely event occur.
All this is an exercise of unrealistic speculation. Far too many flights of fancy on the go on this board at present though this one pales in comparison with much of the board/Lennon hoohah.
Common misconception in Scotland that a verbal contract is legally binding. Only a written contract is in any way binding.
However I would imagine that there is a full written contract between Hibernian FC and Scott Allan. This will have a start date that begins once his current Celtic contract expires. Not ITK on player contracts but have a lot of experience of other contracts mainly property.
Contracts can be done verbally in Scotland (unless they fall under within the requirement of writings Scotland act 1995. Hard to prove in some cases though.
If an agreement is a gratuitous unilateral obligation then it must be in writing to be enforceable as it deemed a promise.