What is failure to perform or follow through with an obligation?
Breach of contract is a failure to perform or follow through with an obligation. A breach of contract can be grounds for a lawsuit against the guilty party.
An obligation is something you are bound by duty to do. It could be a legal obligation arising from a contract, in which a person has promised to do a certain thing as a part of the contract. It could be a moral or ethical obligation which could arise as a result of a promise which is not legally binding, or from a relationship. E.g. "You said you'd visit the sick and elderly after church…
The past tense of 'follow through' is followed through. The verb phrase 'follow through' (followed through) is made up of the verb 'follow' (followed) modified by the adverb 'through'. The term 'follow through' (or follow-through) is also a compound noun, a word for the continuing of an action or task to its conclusion; a word for a thing.