The functionality of a particular prohibition lock will depend upon the Statute that provides for the registration of the lock. These locks are similar to the Registrars Caveat under the former Land Titles Act . However, some prohibition locks prevent the transfer of a title while others prevent dealings with interests. The functionality of each prohibition lock is discussed in detail below within each lock description.

• Builders' Lien Lock - Certificate of Action. This lock will be placed on a title when a Certificate of Action - Form O of The Builders’ Lien Act is sent to the Registrar.
• Conversion - Registrar's Caveat. This lock was registered at the time of conversion when a Registrar’s Caveat had been filed on a certificate of title.
• Deficient Description. This lock was registered at the time of conversion when, in the opinion of the Registrar, the reference land description or an instrument referenced on a certificate of title or abstract folder was deficient.
• Duplicate Ownership. The Registrar will use this lock where there appears to be two or more titles with an overlapping or duplicate interest in the same land. 
• Estate - Proof Required that no Infants Involved. Pursuant to Sections 71 and 72 of The Land Titles Regulations,2001 this lock is registered to ensure that a potential interest held by an infant in an estate is dealt with prior to a title transferring from a personal representative. 
• Farming Communities Land Act, s. 4. This lock will ensure the title to land is protected pending the outcome of disputes under The Farming Communities Land Act.
• Gap - Ownership Unknown. Where there are apparently contiguous titles with a gap in ownership the Registrar will lock the titles with this lock. 
• Joint Tenants with No Survivorship. This lock is placed on a title when an application to transfer is submitted indicating the title is to be held by joint tenants with no survivorship.
• Ministers and Court Orders. This lock was placed on a title or interest at the time of conversion when a court order was registered on a certificate of title or when a court order has been sent to the Registrar.
• Ownership Less or Greater than 100%. Where the shares of titles do not add up to one hundred per cent ownership in the parcel, the Registrar will lock the titles, and may use this type of lock.
• Planning and Development Act (s. 146) - Notice of Replotting Scheme. This lock is used to prohibit dealings with the land within a replotting scheme.
• Planning and Development Act, 2007 s.139. This lock is used to prohibit dealings with the land until the sub-division process has been completed.
• Registrar's Prohibition - General (Dealing with Land Prohibited). This type of lock is the most common lock used to indicate a Registrar’s Correction is required.
• Registrar's Prohibition - General (Transfer Prohibited). This type of lock is used to indicate a Registrar’s Correction is required. However, this lock will only prohibit a title transfer.  It will not prohibit any other transactions.
• Registrar's Prohibition - Court Order. This lock is used to ensure a Court of Queen’s Bench court order is given effect within the Land Registry.
• Registrar's Prohibition Interest. This lock is used in two circumstances:
  • when it has been determined that the correction required should only prevent dealings with the interest
  • when a court order is obtained directing the Registrar to prevent an interest from being discharged