A worryingly large number of people still do not make a will. The number of intestate deaths is still at a high level often resulting in difficult wrangling over the estate of the deceased person or, in some cases, the Crown simply taking everything. Even those who do make a will, however, are not always safeguarded. There are circumstances in which it is possible to appeal against an individual’s will and this happens more often than you may think, for one of two main reasons: because a person or group think that the will is either invalid, or that it is unfair.
Validity
In order for a Will to be Valid, it has to satisfy several basic conditions. Primarily, it must be signed by the testator (that is, the individual making the will), and must have been witnessed by two other people. One of the most common causes for complaint with regard to the validity of the will is either that the signature of the testator was not witnessed, or that the two witnesses were not present together when the will was signed by both the testator and themselves. Similarly, it is sometimes claimed that the testator was not mentally capable of making the decisions outlined in the will. In these cases, the entire will may be invalid. Furthermore, it sometimes transpires that one or both of the witnesses is also a beneficiary of the will. If this is the case, then the witness in question will not receive anything left to them in the will, and their share will be put back into the estate as a whole. The rest of the will, however, remains valid.
There are very few cases like these in which it is easy to prove that the will is invalid. If you were to contest, for example, that the testator was not mentally capable, then you would require firm medical evidence. You may need to go to court, and you will certainly need expert legal advice, so you should seek this first.

Answer a few questions to find out whether you need a will and what type.
Try our Do I Need a Will? Checker free, here on this site →Your situation may be slightly different. ask a question below ↓ and our editorial team will reply with our advice.
Dependants
It is also possible to challenge a will on the basis that it does not give ‘reasonable financial provision’ for the dependants of the testator. In order to make a challenge on these grounds you must be either: the spouse or civil partner of the testator; the former spouse or civil partner but you have not remarried; someone who has been financially maintained by the testator; someone who had lived as a partner with the testator for at least two years before their death; or a child of the testator.
If you fulfil one of these criteria and you feel that you have been unfairly left out of the will, you may have a claim under the Inheritance (Provision for Family and Dependants) Act 1975. This means that you may be able to claim a portion of the estate, but it is very difficult to do so. Although it may not be difficult to prove that you fall within one of the groups listed above, each case is treated on its own merits by a judge. As a result, it is far from certain that the case will go in your favour, and if it does not you may well be landed with a large bill for court expenses. If you are thinking about following this course of action, you should seek legal advice as soon as possible; it is also important to note that a case must be lodged within six months of the granting of probate on the estate.
As tenants in common your brother & girlfriend would have owned a different type of share in the property and the property wouldn't automatically have gone to them when your mother died and she could have passed on her share of the property in her will.
If the ownership was the latter, your right would have been preserved and your brother could have been made to sell. See a solicitor and explain what has happened - they should be able to investigate.
So she had to put a in claim against the estate and received £48,000 it cost £100,000's in legal fees.
His parents gave him 25% of a farm and now that share is mine. My grandparents are still alive and are now in their 80's. The problem is my Dad had a brother and I'm worried he will receive 75% of the farm and I remain at 25%. In my opinion it should be 50/50 as they were brothers however as I am a grandson representing my Dad I'm not sure how it will pan out. If the will went 75% to his brother would I have a good chance of winning an appeal.
Ask The Will Expert a question
Ask our editorial team a question and we will reply with our advice. Tell us as much about your situation as you can: the more detail you give, the more useful our answer can be.
You do not need to use your real name. Please do not include your full address, phone number, email address, or the names of other people. We may edit or remove identifying details for privacy and legal reasons.
Comments are moderated before publication.